Mixed feelings ??

I am 31 weeks pregnant and I feel so frustrated I just want to go back to my old self. I feel like a walking meatball right now. But I'm also excited to meet my baby but I kinda want him to stay in my belly forever. I'm a first time mommy so I'm just nervous and scared about giving birth.  But I just want to be done with being pregnant it's not very fun but I'm sure it will be worth it once I hold my baby ??