I am 11 weeks PG, first timer. everything was fine till week 11. Even before PG and during first 10 weeks I had just a wobbly tummy, but this week my belly is getting bigger day by day!!!! I am not eating any more than I had been before... i am doing regular (everyday ) exrecise: either walking for an hour a day or swimming for half an hour 2-3 times a week; so i really do not understand why it is getting so big?! have not had a scan yet, but noone in my or my DH families had twins... so i am puzzled..... is it normal? pls share your experience!! anything would help