If the strap doesn't use acupuncture points, is it really acupuncture?

I tried the strap but I didn't get total relief and the pain kept coming back. What did I do wrong?

Does the strap work for everyone or is it less effective for certain people?

How long does it take for the pain to go away?

Why not just take pain medication for period cramps?

Can I apply the strap over my clothes?