I found viagra in my boyfriend's vag

My boyfriend and I have been together almost 5 months (not that long). Weve had sex like everyday when we were first starting dating. Then we started to have problems almost every day n stopped having sex for a little. We almost broke up. Things are okay now. He thinks I'm cheating on him bc I've been accusing him. Well he use to work a lot until I got a job and now hes been getting out earlier. Well I was going thru some stuff and saw something in his bag. It was viagra wipes??? 4 packages and two of them are used?? Ik weve had a few problems were we had to stop bc he couldnt stay hard. And like once were he couldnt get hard bc we were not ok n sex was awkward. Should I be worried?? Has he cheated? How do i talk to him about this. I've been cheated on in all my relationships n ik hes different. But I cant help but think.