What is my period doing

Ok so I’ve been super stressed out about my period arriving and when it finally did it started out spotty and then over night it was a lot of bleeding and it was darker blood and I was excited and happy and then I went to Chang my tampon later today and now I’m not bleeding all that much. I usually bleed a lot and have to change my tampons often and get heavy cramps the first day which I experienced over night but now I hardly have any cramps and I’m very stressed and anxious. I also keep telling myself that my stress anxiety and me not eating the best is effecting my period but idk someone plz help