High Latency, Slow Speed, Ect...

I'm experiencing slow speeds and spikes recently. It seems to go away after a few days and then reappear mostly on the weekends. When I play video games, I get constant disconnects from them. I also get disconnects from voice chat programs making all internet experiences horrible. It has only been doing this for the last 3 weeks. My internet connection doesn't even disconnect. It didn't even disconnect once, just XTREMELY high latency/slow speeds in frequent spikes. The spikes come every 15-20 seconds sometimes longer and sometimes short. Some spikes are much higher than others. Please let me know if something is wrong on your end. If not I will trouble shoot the best I can here, which I have already done by the way.