Weight gain & losing weight post partum.

I'm so nervous for how I'll look and feel about myself post partum. I'm 29 weeks and I've already gained like 30 pounds. I gained far too much in the first trimester so I kinda screwed myself :( any mommas have experience gaining a lot and were able to lose it? weight has always been an issue for me and I try not to think about it but it really makes me upset. I know I'll be totally focused on baby but my son's father and I aren't together so I don't have a husband telling me I'm beautiful or anyone really, and this weight gain has been hard on me already, I can't imagine how I'll feel once I'm no longer pregnant.