Feeling weird after smoking weed

22 M here When i smoke weed i kind of feel People watching me and judging my every action

I start to think of different situations of my life (when I was not high) and think of it like a shameful act .

Also another major issue i face is - i start to connect totally different dots to other different dots which seems to be very negative - like my gf cheating . I don’t know why i feel this way -

2-3years back(before collage years and early collage years )i used to feel very good .

How can i cope with this issue and relax like before , is it because I am not happy with my current life ?