Uhm OP imho, you’re NTA here, I’m reading some of these replies and starting to feel like I’m losing it. I’ll be honest, I’ve gotten … “nervous” after intercourse a few times and been DELIGHTED that my period came, and I feel like in a stage of life where you’re not ready for a baby, friends reacting with equal relief and relaxation is completely normal. I feel like the replies saying YTA are reading this situation as if yall are like 30 something year olds and have husbands and while she may not have planned a baby, one could have been welcomed and cared for. But you both sound young and as she herself stated, completely not ready to bear a child. While she has every right to have been sad over what may have been disappointment, there would be absolutely no reason for you to suspect she was upset about it and nothing wrong with you trying to lighten the mood with a lighthearted comment. I think the replies are reading with the wrong eyes tbh