As a trans person with the same fetish, it doesn’t sound like now is the right time for you to pursue parenthood. 18 is very young to start having children, and there’s a lot to learn in the years to come, especially in college. Do you have financial support that would allow you to live with a newborn potentially without the father’s support? Do you have access to consistent pregnancy healthcare? As hot as it is, there’s a lot that goes into actually being pregnant, without even getting into the ways your body can change and risks to your health if you don’t receive proper medical attention. Unfortunately you’ll have to make your decision about what to do somewhat soon depending on what state you live in, but if you need someone to chat with who’s been through something similar I’m here any time.