Does provera (medroxyprogesterone) make ur periods regular? Once starting provera (medroxyprogesterone) is it normal to have two periods close together?

No, Yes. Provera (medroxyprogesterone) does not make your periods regular. In fact you will not have a period while you're under the effects of that medicine. You will, however, have unscheduled light bleeding, especially if you recently started with this medicine.
Depo-provera. I suspect you're referring to injection, depo-provera, which typically leads to irregular periods and then to no periods at all except for occasional spotting. This should be made clear to you prior to administering this medication (as well as to offer you other options). Check out http://www.Drugs.Com/depo-provera.Html for more info. And remember that depoprovera doesn't protect against stds.