I'm probably just freaking myself out but I've just found out I'm pregnant and I posted in chat about having several faint lines before giving in and doing a digital test and lots of posters replied that they had that too and it turned out to be twins 
I'm only 5 weeks but I felt sure I was pregnant because my tummy looks/feels rounder. I do have two children already but was small with them - I feel conscious of my tummy already and have noticed glances from others. I have constant heartburn and my heartbeat feels faster, plus I've had some cramping and bad backache.
What were your early signs you were having twins?