I’m scared!

Hey everyone I’ve always wanted children and a part of me still does but I’m absolutely terrified of what it’s gonna do to my body specifically down there I’m not sure my body will be able to handle it I’m 5’2 and 110 pounds etc anyone else felt this and can anyone give me some advice

On top of that I tried to share my fears with my boyfriend and I just don’t feel like he gets it he’s said it your choice and that’s great but it’s not an easy decision I wanna be a mom but again I’m 5’2 and 110 pounds at 21 I’m afraid it’s gonna destroy me down there etc