I'm 5'1 and weighed 110 pre pregnancy. I'm only 13w2d now & haven't had complications. I'm barely showing now. I had a friend who is very thin and was 95 pounds when she gave birth she was very healthy tho without any complications. But everyone's different. Good luck
I'm 5'1 and pre pregnancy i weighed 105... I had a tiny bump at 17 weeks but didn't really start showing until abut 24/25 weeks:) as for complications, like said above, every pregnancy is different so you might and might not have complications, to this point i haven't had any complications.
Everyone shows at diffrent stages. No two women or pregnancies are the same so you'll just have to wait and see. As for being so small you'll have to talk to your docor about if there are concerns.