How can I deal with this feeling constructively

I (23 F ) have been dating my boyfriend (23M) for 8 months , we’ve lived together for 4, buying a house ( we close next month !! ) have multiple vehicles.

Refuses to agree to getting another dog , which really upsets me because I had to regime mine because she had a lot of medical bills I couldn’t afford ( she had diabetes and GI issues). I dont see a dog as “ another mouth to feed or something else to worry about “ like he doesn’t. I’ve always had a dog I don’t feel complete without one and two, .. completely separate topic but this one bugs me more.

TMI WARNING !!

I like when my partner finishes inside me , he won’t finish within 10 feet of any holes because he doesn’t want to get me pregnant. I feel unsatisfied and incomplete and at this point like he doesn’t like me it’s feeling like rejection at this point.

We have plans of getting married here soon and not that I want a kid this second but I’d like to feel satisfied during sex that way and he thinks if he comes in me once that’s it I’m pregnant.

I tried explaining to him I have PCOS I tried for 3 years with a previous partner it’s not going to happen I will take birth control again if it pleases him but even then it’s still a no.

I do want a child with him the sooner the better tho it’s going to take a lot of work to get me pregnant with probably medical intervention.

I know whole heartedly this is the man I want to spend the rest of my life and I know he feels like same but here lately it just feels like I’m not good enough and rejection ..