Website takes too long to respond and not sure where is the problem (please help)

Hi I was following these tutotials (here and here ) and now I cannot access the website and it keeps returning a “Website takes too long to respond error”. It is my first time trying to set up multiple subdomain with cert in one go, so I am not sure if I did anything wrong. And if yes, at which part.

My set up:

• Nginx
• 2 Nodejs server in one droplet with the same domain (1 in port 5000 , and the other in port 7000)

You can see my server block below:

server {


	root /var/www/html;

	index index.html index.htm index.nginx-debian.html;

	server_name www.domain.com hi.domain.com;

	location / {
		proxy_pass http://localhost:7000;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection 'upgrade';
                proxy_set_header Host $host;
                proxy_cache_bypass $http_upgrade;
	}


    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/domain.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/domain.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot


}


# Virtual Host configuration for example.com
#
# You can move that to a different file under sites-available/ and symlink that
# to sites-enabled/ to enable it.
#
#server {
#	listen 80;
#	listen [::]:80;
#
#	server_name example.com;
#
#	root /var/www/example.com;
#	index index.html;
#
#	location / {
#		try_files $uri $uri/ =404;
#	}
#}

server {


	root /var/www/html;

	# Add index.php to the list if you are using PHP
	index index.html index.htm index.nginx-debian.html;
    server_name www.domain.com; # managed by Certbot


	location / {
		proxy_pass http://localhost:7000;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection 'upgrade';
                proxy_set_header Host $host;
                proxy_cache_bypass $http_upgrade;
	}

    listen [::]:443 ssl ; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/domain.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/domain.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot




}


server {


	root /var/www/html;

	index index.html index.htm index.nginx-debian.html;
    server_name domain.com; # managed by Certbot


	location / {
		proxy_pass http://localhost:5000;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection 'upgrade';
                proxy_set_header Host $host;
                proxy_cache_bypass $http_upgrade;
	}

    listen [::]:443 ssl ; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/domain.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/domain.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot




}


server {
    if ($host = domain.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


	listen 80 default_server;
	listen [::]:80 default_server;

	server_name domain.com;
    return 404; # managed by Certbot


}
server {
    if ($host = www.domain.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


	listen 80 ;
	listen [::]:80 ;
    server_name www.domain.com;
    return 404; # managed by Certbot


}
server {
    if ($host = hi.domain.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


	listen 80 ;
	listen [::]:80 ;
    server_name hi.domain.com;
    return 404; # managed by Certbot


}

I double checked that the keys from the letsencrypt folder are in the right directory and when I run sudo nginx -t, I receive no error. When I run sudo ufw status, I got:

Status: active

To                         Action      From
--                         ------      ----
Nginx HTTP                 ALLOW       Anywhere
22/tcp                     ALLOW       Anywhere
Nginx HTTP (v6)            ALLOW       Anywhere (v6)
22/tcp (v6)                ALLOW       Anywhere (v6)

Any help will be appereciated!