Springy love, it has nothing to do with George's size, it's the fact he will have a bit of trouble feeding if he is born now and that will make bf difficult as well as him needing time in SCBU. As Bronze says, not nice.
If you want my advice, don't have sex at the moment - no orgasms for you I'm afraid, definitely no thrusting, no swallowing of sperm but spitting after a BJ is probably OK.
If I were you I would consider booking in for a home birth right now, because you might then find the standard of mw care starts to get a lot better - appointments at home, ability to meet the whole team of mw, that kind of thing. Coupled with a judicious complaint to PALS about your experiences last night and you may find suddenly they take you a bit more seriously. Once you have booked for a HB you can change your mind at any time, even during labour, so you are not committing to anything at all. But you do get better care in the interim.
Also remember you are very young, so no matter what your personality is like, there is a certain kind of medical professional who will fail to take you sufficiently seriously on that basis alone.