Third Trimester Sex

am I the only one who finds sex so painful. I mean my sex drive hasn't really been there my entire pregnancy but i had my days and it was still enjoyable. but now I just turn my face at any sign of it. I feel bad because my s.o is frustrated so I try once in a blue especially because after the baby he'll still have to wait. but literally all the positions they say should be better/ easier like getting on top or doggy it's just really painful to the point i start tears will start coming down. and in top of that I can hardly open my legs w/o feeling pain so missionary is like out the question. it's like im a virgin x10 all over again. is this just me ? or