dates wrong?

Little background. I have a son who is 8 months and 15days old and according to my 12&20 week scans I am 29weeks and 1 day pregnant but I feel like I'm further along and my belly is measuring at 32cm with on my chart would put me way about the 95%. The midwife and doctor are refusing a growth scan even though I'm way bigger than they say I should be and they say from what they can feel there is very little water around her. I know every baby is different but I'm huge I don't fit in any clothes I have spd but can't have any help because there is a waiting list longer than I actually have left been pregnant. I can hardly move and it's just really really frustrating that the hospital are doing literally nothing to help. I'm so done with been pregnant. I tried for 7 years to have my son and hated that pregnancy then fell pregnant again really fast on birth control and useing condoms and now I'm so depressed I can't enjoy my son. I'm starting to feel like I hate my daughter before she's even here and I have 0 support. Sorry that turned into a small rant. Having one of those days where all I want to do is cry 😓