Losing yourself to motherhood

I need some advice. My daughter is 1 year old, and ever since I got pregnant with her I have not been the same. I wanted to be a mother since I was a little girl! So obviously when me and my husband found out we were expecting I’ve been 100% devoted to becoming the best mommy I could be! I had a very rough pregnancy, but I’m lucky enough to have a husband with a great job and can support me being a stay at home mother. I’m only 23 years old, my husband is 24. He didn’t lose himself in being a father, he’s a great father but he knows how to still have fun. I on the other hand don’t. We got married when I was 19 and he was 20. We still had fun, went to shows, concerts, I’d hang with him and his friends and my friends too and just have a great time. Now I’m so anxious I can barely leave the house, I don’t like to drink not even a shot or 1 beer, it makes me so anxious I start to panic. I know my husband wishes that we could just be young sometimes since he works very hard and he does go out with his family, friends etc. once in a great while but he says he wishes that me and him can have a night of fun or just a few hours without me having a panic attack. I don’t know how to have fun. We’re so young. I don’t really even leave the house except to walk with the baby, take her to the store or park, etc. and I’m letting myself go pretty badly. I feel bad for him cause what he is telling me that he misses isn’t even too much to ask for. I just don’t know how to handle it all. I want to have fun too. It makes me really sad..