not sure if i’m pregnant

so i missed my period in june by 3 days, took a test & it came back positive, but i started my period that same day. i still felt really nauseous and fatigued for the entire month of july so i took two more tests & they were both negative, although they were digital tests. my belly has been feeling a little bigger now that it’s august, and i took another test and i’m not sure if it’s positive. i took one of the cheap ones & another digital test and they were both negative. should i have my hopes up? were they false positives?