I am currently 17 weeks pregnant with my third baby and everyone keeps telling me that I look like I'm having twins cause of the size of my belly.
Could it be twins or am I just bigger cause it is my third pregnancy? I don't have any twins on my side that I know of and my other two pregnancies were single. My sister has had 3 babies and all were single. My fiancé and this baby's dad has identical twin sisters.
My doctor hasn't said anything about whether I'm measuring big. I'm going to as new doctor on Tuesday and I'm getting another ultrasound.
It sounds like you have already had an ultrasound and that it didn't say you were having twins, so it is very unlikely that you are.
I think your own suggestion is right, this is "third baby" weight.