CS GO, fps drop

Computer specs: - 16Gb of RAM - intel core i7 4710HQ - intel HD graphics 4600 - 1 Tb of memory

Ok, so I did alot of researching, and found this question. Question for fps drop

And I literally have the exact problem and symptoms. But my fps is 120, instead of 250. If you don't know, my fps drops to the 40's. And after 3-4 days (maybe even 1-2), it goes back to 120 fps. The problem for that question, was a broken card. But my fps refixes it's self (after time) so that can't be it, right? I really can't afford a new card (and I have a laptop, and it's integrated into the CPU), mostly because my GPU is a Intel HD graphics 4600, so I usually thought when this was first happening that there was an update or a bug that messes with Intel GPU cards.

I don't really know how to fix this. What to try and fix. I mean I looked at the question, And I have the exact problem, with my fps dropping to the 40's, and when I shoot or do things, it lowers.

Should I get a new APU? (I don't know how either to put it on, I'm poor, can't afford the core i7 4710HQ processor either) Should I try some fixes? or should I just wait it out like the last couple times?

EDIT: turns out it's for most of my games..