Allow certain ports in when configured as VPN client

I’ve set up NordVPN OpenVPN client using this guide on Omnia, but now I can’t reach my network from outside using public IP ISP provided me. Thing is, I’m hosting simple web server to which I’ve forwarded HTTP/HTTPS ports, when I disconnect VPN interface it starts working, but I’d really like to use VPN client on router. Is there a way to exclude these incoming ports from VPN?