Well ive ben sick l8tly and idk whats wrng.do you?

i missed 2 periods nd i never missd a period before in my life,they b normal like clock work, i did have unprotctd sex in april, i took a test 2 wks later den a week later den 2 mre weeks den anta week den dis weekend, they were all negative bt i have all the pregnany syptons. even da black line down my stomach nd my belly button deeper. bt ive ben crampin eva sinse May nd today i start bleeding like my period was comin on but it wasnt as heavy as a normal period. sooo if it tuns out im not pregnant whats wrong with me. a cyst.? Ibs? etopic pregnancy.? hormone inbalance.? ughhh soooo many possibilities