another thing while I'm trying to get rid of my migraine. So at my 1st ultra sound at 22 weeks the baby was weighing heavy/a week AHEAD of due date however after meeting with my obgyn whenever she measured me 1st a week or so later after my US she thought my uterus wasnt as high as expected so she had me lay back farther n said "oh okay you're right on#" well last week she measured again and thinks I'm not as far along however I KNOW that's not possible; so what's the deal?