After taking the prometrium for ten days I would normally expect you to have seen a period over the last couple of days.
If you do not get a bleed by the next 72 hours then make an appointment to see your Gyn. You will need to have an ultrasound to look at thickness of uterus lining, and also state of ovaries. Taking Depo provera can often result in absent periods for up to 12 months after stopping, so I would not be too worried just yet. The effect of the depo is to suppress your natural cycle and this means that you would not ovulate and therefore no period. Have your doctor run tests on FSH and LH although they may not provide any more definite answers at the moment.
FSH and LH are hormones involved in the menstrual feedback cycle. If the levels are very abnormal then it can indicate premature menopause, but with the history of depo provera use then I'm not sure that the results will be reliable at the moment. The ultrasound examination will be a much more useful test.