i feel like i'm pregnant with twins, help please??

[iamkari88]

i have had an ectopic pregnancy in the past so every time i have got pregnant, they want to do an early u/s to make sure it isnt in my tubes again. well i went on the 15th and bc i was so early they had to do a vaginal u/s. they said they only saw 1 sac and it measured at 4 weeks 2 days. 1 day ahead of what my lmp says i should be. they looked for my left tube(the one i have had pain in) and couldnt find it but said that since they found a baby in the uterus, i should be ok on not having another ectpoic this time around. . well neways...i have a feelin its twins bc i just feel so different. it seems like im having a lot more "growing pains" and sooner than i had them with my other 3 pregnancies. it is all mainly on the left side.i also have a heavy/full feelin in my lower abdomin but its not like a bloating feel....if ya know what i mean. its kinda hard to explain. it just feels soooo different. this is pregnancy #4 for us so i am pretty aware of what goes on what not. i have thought about the possibilty of it being a boy and thats y i feel so different but....i have a really strong feeling it twins and i cant get it off my mind. twins would be awesome, but im happy with what i get. i was wondering if any of you ladies have had a hiding twin at 4 weeks? and can there be a possiblity that i am carrying twins? my grandma had twins but miscarried both. also, if you did have a hiding twin, when did they find it? and did you know all along it was twins? sorry its so many questions.