hey

i have a question so i had my last period in april around the 20th regular for the normal 5 days. i have had frequently unprotected sex with my partner. about 4 weeks ago i had a light red spotting for about 2 days and i been having cramps as my period would start soon, lower back pain, nipples are very sensitive (in a good way), my partner said i been a lot more hornier, and sleepy. i already took 3 test and they came back negative. also yesterday i woke uo used the bathroom and wiped it was a full sheet of brownish but more clear blood soi inserted a tampon for about 3 hours when i removed it it was pretty much clean and i haven't seen anything else. i'm really not sure what going on with my body right now. my period used to be irregular but since i got off hte shot its been late like a few days a week tops but nothing major. do you have anything for me?? i'm a female and 22