My Boyfriend

His normal smell after we been together for a year I ignored it so then I went to smell his dick when I was going to suck it then it smelled different and tasted different 😭am I being paranoid because I'm on my period or what I told him was he cheating because of how he smelt and he was being a ass what should I do . Then he told me before he left he said I would tell you something but I'm not gonna start tonight so what should I do . Then I pulled his pants down then he had pre cum and I'm like how we didn't even do shit or none so I'm like wtf you been what should I do because that pissed me off