Could I be farther along?

emccray1891

When I went to the doctor they had asked when my last period was and i never kept track of it so i just went with something off the top of my head. They are saying i am 28 weeks due at the end of june. My friends are also pregnant and they are farther along than me and my belly is way bigger than theirs. I have no yet asked my doctor to do a fetal weight ultra sound i figured it was to soon. I just wonder if there is anyway to tell besides ultra sound??? help!!