Started depo shot 2 months ago (not within the five days of my last period), used back up for 1 month. now experiencing sharp pains in vaginal area and no periods. is this normal? did i use backup for a sufficient amount of time?

Yes, you used a: back up contraceptive long enough. Many women stop having periods while they're on the Depo shot, so this is to be expected. However, I wouldn't expect you to have vaginal pain. I suggest you follow up with your doctor about this. Best wishes. Dr. Anne.

Yes and no: Yes you used back up enough. No periods are common for people on Depo, but the vaginal pain is not. Get the pain checked out by a professional.