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as far as we can figure I am about 7 weeks but look like i am about 4 months already have to wear maternity clothes, this will be my 4rh pregnancy i have 2 boys and had a miscarriage at 17 1/2 weeks, my Grandmother on my fathers side was a twin, is it possible that i am pregnant with twins and how do i get the doctor to give me an ultra sound to determine exactly how far along i am and if it is twins?