Help me please I want my confidence back

I just want to feel confident again. I am 20 weeks Pp and I lost some of my confidence during pregnancy and now I'm completely insecure with my body and sad when I see myself in pictures. This was my second childbirth and I recovered much better with the first, even after gaining over 80 pounds I was back to my body within a month and had my body with a few stretch marks but I learned to embrace them. Due to severe tearing I had 26 stitches and reconstructive surgery so was unable to do any exercising for a while (I could barely even walk it was so painful) a few weeks ago I was able to start moving around much better and have started walking and yoga. I'm also doing a little exercising one day for tummy one day for thighs and butt. This pregnancy I lost my butt! Completely! I also have such a mushy tummy and a little pouch and I am not expecting a 6 pack but I would like to have a toned tummy with no pouch and I really need my butt back even my family and boyfriend have said I have no butt anymore so I know it's not just me or in my head I will show before picture for reference. Anyways please any advise and ideas and exercises to get my body back I'm desperate and hate feeling so insecure. Thank you in advance.

My mush and pouch

My missing behind

What I want to have back

Thank you for any help