Pregnancy Scare!!!!

Abigail • Stay at home wife/ crazy cat lady and mommy to angel baby. Due in March with our rainbow girl!
So recently my boyfriend who I have been living with for a couple of months now proposed to me and I said yes. We have been dating for close to 9 months by then and we have been having a lot of unprotected sex but we did use condoms sometimes. Lately I've been getting nauseas, gaining weight, getting lightheaded, tender boobs, cravings, and I'm always super hungry. My fiance asked if I was pregnant and I started to freak out a little bit cause right now my fiance and I can't financially support a baby and he said he wasn't ready to be a father. We kept talking about it for the rest of the week and I started getting excited about having a baby with him and was hoping the test came back positive. The next week we took a pregnancy test and it came back negative and I was so sad. I was just wondering was it wrong of me to want a child even though me fiance isn't ready to be a father yet?