question (and if theres any doctors on here plz help me out)

Ok so ive never been tested for hiv or any other stds (ik i should but my mom doesnt know im having sex bc she will kills me if she finds out so she wont take me to get tested, neither will any other close family members) but i was sucking my bfs dick the other day he didn't cum though i bruahed my teeth and washed around my face after and i dont think i have any cuts or sores in my mouth, and another thing he popped a zit then we kissed multiple times yesterday i washed around my face and brushed my teeth when i got home, he tells me hes clean but i wanna be for sure. I asled him to get tested he said ok. But i still wanna know if its possible if i got anything from him if hes not clean.