Disappointed

Iv been with my new partner about 2months and we use the pull out method, my friend noticed a few things about me eating more and sleeping more being tired all the time as way she advised me to take a test just to be safe (my period's are always up n down) I never wanted a kid and when the test showed negative for some reason I was really disappointed and a few times during sex I never want him to pull out I want him to finish inside me why am I feeling like I want a kid or?