so a few hours ago my boyfriend and I were having sex and my boyfriend was about to cum so he pulled out and cummed, we were doing it in " doggy style " so my back was facing towards him, as he was cumming, he pulled out and cummed on my back, I don't mind this, but anyways, I literally felt the sudden urge to cry and I tried so hard to hold it in because I wouldn't know how to explain why I was crying. Is this normal? I feel so bad about it, and I don't understand why I was crying, I didn't want my boyfriend to feel bad because I mean it's not his fault right?

I felt so sad afterwards and I just said I was too tired to continue but it was just that I was really sad afterwards. Please give me some advice or help me understand why this could of possibly happened , I feel so sad about it tbh because our sex is usually great and it makes me happy but I felt really emotional after it.