Help please :)

So, I started experiencing pains in my stomach and nausea throughout the day a few days prior (May 27th) to my period. At first i thought it was early period symptoms but then my period which was suppose to start on May 31st) was 5 days late and i decided to take a pregnancy test but it came back negative. I got my period on the 6th day it was late but it was kind of irregular and had lasted 10 days instead of my usual 5. I’m still experiencing these symptoms of nausea, loss of appetite, my lower abdomen feeling tight, tender nipples, lower abdomen is also sensitive to be touched, and just really sensitive skin. I also cannot comfortable lay on my stomach. it is now june 17th and i keep having weird bleeding on and off and a brownish discharge. If any of you could give me an opinion on what you think it is or what i should do next please lemme know. Thank you :)