PLEASE HELP FIX STUTTERING

Ok, so this all started about a week ago.

I went on CSGO one day and noticed that I was lagging quite a bit. I also noticed that it was not an FPS lag. I did some research and found out that it was a stuttering problem. Today I went on CSGO and my ping was at 25, but I was still stuttering. Now this is happening on more than just csgo, ex. Overwatch.

Im on a wireless internet connection and Ive tried everything that I could think of. I flushed my DNS, reset my router, moved my router from my basement into my room, adjusted settings (in game and on the NVIDIA Control Panel), and updating all drivers, including audio drivers, and nothing seems to work. Now when I try to play overwatch, my ping rises up to sometimes over 100 ms.

I do not know what to do at this point besides setting up an ether-net cable. I will be setting one up soon, but am afraid that it may not be the solution. Does anyone have any suggestions?

Any help would be greatly appreciated!

Also, my graphics card is a GeForce GTX 1050ti, and, I have an intel i5 quad core processor.