I am currently 29wks with my 3rd child. At 20wks i was told i was having a girl then at 23 & 27wks i was told a boy. Today i had an ultrasound since my Dr said my tummy was measuring big. The tech advise everything looked OK baby is measuring 2lbs 14oz but could not determine the sex. I'm a little confused i have not boughtmuch other than the basics (no clothes). Also i notice stomach has dropped, I'm having pressure down below & the tech notice today that baby head is already down. Is it possible i could be prego with twins or am i just freaking out? I don't have twins in my family but the father is a twin.