Used condom

So my boyfriend and I have been together for 10 months. I am pregnant. We are off and on a lot. Earlier today we went to his house, his room was a mess but I was messing with his tv and saw a used condom in his trash no semen but it did have white streaks on it as if it was inside a woman. I confronted him about it and he said he used it to jack off I did smell it and it didn’t smell like anything other than rubber. He said the white on it was from using lotion with it. I seen the lotion he used and it didn’t have a smell either. There was napkins in his trash as well that he said he used too. But he was also sick so he was using them anyways. Idk what to believe. He swears on his mother father and our unborn. But what do I believe? There’s so many reasons why I don’t want to believe him but there’s also few reasons why I do. I’m hurt.