pain in belly?

I'm almost 34 weeks pregnant, and since last night I have had a strange pain in my belly, about 2 inches up from my belly button. Also, it feels like the back of my belly button hurts...
Do you think I should be worried? I don't want to call the hospital and sound like an idiot if it is a normal thing, mum says its probably just feet in the ribs, but it doesnt feel like that usually does, and its a bit lower than my ribs.
Any replies will be greatly appreciated!