Ptsd?

I have these attacks where my whole body ends up hurting .. I get stiff and I see things and hear fighting and I'm trapped ..I thrash or hit myself and mostly go to bed till it passes . but sometimes they are so frequent and so frustrating that I harm myself .. I deserve it and it makes them stop yelling and stop attacking and I'm usually safe for months .. I self harmed today I have too much to do to roll in bed and hope the bad people go away.