A little nervous.

We aren't trying to conceive, but we also aren't trying to avoid it. Just doing whatever and seeing what happens. We are financially stable enough for a child and my partner has two children already, one of them lives with us permanently and the other two weeks a month. So you could say I definitely have baby fever and he can totally tell without me even saying a word. He recently asked me to quit my job to be a stay at home (step) mom. I've been on an off birth control though out my life and never become pregnant. Now that I'm intentionally not on it or taking any precautions to avoid pregnancy I've become more aware of the fact that I may be not be able to have children and it's heart breaking. I have a HUGE family and non of the women have struggled with this. We have done the deed while I'm ovulating almost every month multiple times. I've had signs such as late periods, sore breasts, dizziness, etc in the past but never a missed period or positive test. I know he's fertile. But think I may not be... I'm only 23 and never tried for a child before. Would it be smart to just go to the doctor and have tests ran or just continue being healthy and being patient?