Bump at 15 weeks

So I’m 15 weeks with my 2nd child my first turns 1 in a week, I’m overweight anyway I wear a UK size 16 and since having my first my belly is pretty stretched and hangs a little should I be showing now? I feel like I am but I also feel embarrassed because a lot of people say you shouldn’t yet, with my first I was a lot smaller at the beginning of my pregnancy, a size 12 so my body looked a grew differently.