It's impossible for SatoshiDice to 'rip you off' without you being able to verify they were doing exactly that. Your rolls are determined by the TXID which SatoshiDice has no control over. As Biz said, wait for the secret to be revealed. Once it is you will be able to calculate exactly what your rolls should have been, and I'm certain they'll match up to what you were given.

Keep in mind, 8 losses in a row isn't improbable and bettors should never feel invincible martingaling.