Why do iwake up with a headache , with a backache ihad unpro sex a week ago igoy my per but it was on and off is it cause of that ?

Depends: If you wake up with headache regularly, dehydration or effects from what you ate or drank before you went to sleep should be considered. Unprotected sex is a bigger topic, unrelated to back pain, unless infection is possible. You may need more sleep to feel good when you awaken. Make a sleep diary and record your headaches in order to discuss this with your physician.