I'd love some help with this as I'm not a computer genius..

I've been playing for over 2 years and this has never happened before. I'm now constantly getting the "Host did not receive UDP Packet" error. I have googled and searched it but all I see was turn off firewall/antivirus etc. and I have, and have my pc port forwarded aswell. All that's left is change the router but I'm trying to avoid that at all costs as it seems fine.