Last night i had an upset stomach (not unusual for me, i'm mildly lactose intolerant) and was laying down in bed rubbing my tummy, when i noticed a hard lump above my pubic bone, to the right. It felt about the size of a lime. I wondered if it were the baby, but couldn't think why it would be on one side. I tried laying on my left for 10 minutes and rolling back, but the lump was still on the right.
I googled it today and discovered other pregnant women have experienced the same thing, on both the left and right. They think if it's a hard lump it's the head, and a softer lump is the bum. I can't feel it nearly as strongly tonight and now it's closer to the centre.