Period 3 weeks, went away and came back 2 weeks later with cramping (not norma)l, depo-provera provera (medroxyprogesterone) (3 yrs) aplastic anemia (marrow tans 2009) cause?

Normal depo effect: Irregular periods are the norm on depoprovera. Many patients have no periods at all. Others will experience irregular menstrual bleeding. This is how Depo-Provera works. If you are not satisfied with the bleeding pattern on Depo-Provera then consider using a different birth control method. Aplastic anemia needs to be evaluated by a specialist.

Dysmenorrhea: You really should get in to see your obstetrician and/or rheumatologist sooner than later. Especially need to be seen with some blood work evaluation.