You could check your ip address at ipconfig/all (nowhere else) to see if it has changed. You would lose the internet if you made it static and if the DNS server (s) were the same as your Default Gateway but I don't think your router would have any affect on that, sounds like your ISP or it would happen again. And, it doesn't sound like they're blocking unless it's on the upload side. Are you using Protocol Encryption and also both DHT options on public sites? You could try enabling UPnP, temporarily, to see if that helps.