No period since August 29..

I haven't had a period for almost 2 months. I've taken three tests, took a dose of provera, and still nothing. My doctor says to take another test, and if it's negative to try Provera again. Anyone else have a similar problem? It's driving me crazy, and really getting my hopes up.

*update: I emailed my doctor and told them today's test was negative (unfortunately, but I knew it would be). They're telling me to take provera again, and they're upping my dosage for Clomid. Here's hoping it helps.