am I crazy for feeling like this ?

I've been dating my boyfriend for 7 months. We're only 18 and In our first year of college. We had a pregnancy scare and it turned out negative and I'm really happy I'm not pregnant because I'm not married, only in college, and don't have a well paying job that a child would need but I lowkey feel a little sad that I'm not. My boyfriend and I came up with a plan and everything if I was and we already picked out baby names and I was kinda expecting it to happen but I didn't. I feel insane for feeling this way since I'm only 18 but I can't help but feel a little sad because my boyfriend said he would be happy either way if I was or I wasn't. So is this normal?? We obviously don't want kids right now but I feel like insane for feelings this way because we've had scares before and I never felt this way til now.