Am I still pregnant?

I'm 5 weeks I think, and I've had a miscarriage before, but something tells me something isn't right but I know my doctor will think I'm being paranoid.
I had sore boobs and slight pangs, but last night was quite painfully crampy (not as bad as period pains) and now I just don't feel anything, or pregnant really. I've only really felt anything for a couple of days...
Am I right to be worried? I feel like I'm just waiting for the proper pain and bleeding to start, I don't even have a midwife yet so I've got no one to speak to but they thought I was being paranoid last time I had a miscarriage too!