Why Am I feeling painful lower back pains and cramping

Patient: Why Am I feeling painful lower back pains and cramping weeks and weeks after my period which was early . The pains come and go but when they here it hurts like crazy. I didnt feel no pain at all doing my period, me and my partner also been having unprotected sex nonstop before my early period. Could i be pregnant or is there seriously some wrong with me? Help!

Symptoms: Back pain painful cramps

Doctor: