FPS drop to 5-10 (Uplayable, screen is barely moving with constant stops)

I had 180-240 ping whenever i played league, and all of a sudden it dropped today to unplayable fps (5 - 10 usually). I checked graphic card and it seems to be working well, i also followed the FPS guide https://support.riotgames.com/hc/en-us/articles/201752684-Low-Frame-Rate-FPS-Troubleshooting and it didnt help. It all started when i tried to get into the game screen today. FIrst it cut off my screen and it had a black edge on the right side of the screen. I found solution to it but simply auto-adjusting monitor. Cant find the fps solution even tho i was looking for it entire morning. Did someone else have similar problem, and if u resolved it, how did u do it? Thanks in advance.
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