Do twins run in your family?
.......i was going to ask the same thing....why do you think you will conceive twins ???
Honestly, i would wait until you get your BFP and your see you ultrasound.....tossing up the 'what ifs' during conception will do your head in....

but, in saying that, i think i would freak out if i found out i was having twins....yeah, its all cutsey, and they will be best of mates blah, blah, but honestly...i dont know, i just think of the 2am feeds, will take doubel the time to feed, will they resettle...i dont know....not for me thanks.....