Pregnancy venting

I just need to vent. I’m 29+1, I have two other kids I take care of 7 years old and 4 year old and I know I still have a long ways to go. I’m just sooooo soooo miserable lately. I don’t feel like myself I’m always so drained from work and I feel really lazy from being worn out. It’s soo hot outside and it’s hard to breathe. I also always feel so so heavy and I know I have so much more weigh to gain from baby. I have so much back and pelvic pain, my doctor gave me muscle relaxers to help but I don’t feel like it helps much since I can only take it after work at night all it does is make me sleepy. All I can keep thinking is I want this baby out so baby then I start to feel guilty because I know there are people who struggle with getting pregnant and they wish nothing more than to be pregnant. I feel so awful 😩😓😓 I hate the way I’m feeling with this pregnancy. Please be kind I’m emotional just need some reassurance😓