Freaking out over weight gain??

Smilie • Hello our first baby girl is on the way on the 22nd November 2015... Please be a sticky baby 👼 ✨BD to all
Right here goes. After I lost a stone and a half which tooke ages I ended up being 9 and a half stone and am 15 weeks and feel so guilty that am 10 stone this morning and feel like that's a lot of weight when i don't feel like am showing all that much :( 
Really don't want to gain that much :(