Am I wrong for being annoyed with my friend?

K
I have a friend who bought paintball passes on Groupon ages ago (over a year ago) and they are about to expire. She originally asked me when she bought them if I would want to go. I said yes. I am now 19 weeks pregnant (barely starting to show) and she approached me and said "my paintball passes are going to expire soon. We need to go before your belly gets bigger." I told her I didn't think it was a good idea that I went. She said, "well it's not like the baby is going to get hit while inside your belly." My response was, "no, you're right but I really don't want paintball welts all over my body." She was so annoyed with me, but I was annoyed with her trying to bully me into going. My boyfriend joked I should have slapped her and knocked some sense into her, lol. Am I wrong?