Hey you guys.. I’m new here..

I’m 27 years old and I’ve never been pregnant to my knowledge.. I have taken tests after missed periods but nothing.. and sometimes I’d have bad periods with odd blood clots..

So currently, I started my period about 4 days ago but it was like really light and small clots.. then it stopped.. then a couple days ago it was the same day and now today it’s like an actual flow with blood clots and it’s like brown also.. but I’m also have cramps in my upper and lower stomach and it just feels weird.. I had a tampon in but it was really uncomfortable and I really don’t know what to do..