Lately some shit happend in my life and even though that's already over, I feel like my mental health has been going down. Maybe it's normal, but I figured I'd ask people for some advice since I don't want anything to get out of hand or something.

I notice that I'm often sad and that (especially when I'm alone) I have the constant feeling that something is wrong and I have trouble focussing on things I used to enjoy like gaming or watching youtube. I also often have the feeling that there's something between me and the real world. If I'm correct that's called brainfog? Also, my sleeping schedule has become very bad, even though a while ago it was getting better and better.

Normally I'm the kind of person that's always happy and never really talks about emotions/feelings. In fact, I would often joke about it, but lately I've started to notice that I'm just not really feeling alright. 

I'll probably get through it, but as I said I figured I'd just ask you for advice. Is this something to worry about or not?