My last period started on the 22nd and went to the 26th, I have a 25 day cycle. I have unprotected sex with my husband on the 26th after I had stopped bleeding . The past 2 days Iv had cramping, blowed, head aches, lower back pain , moods up/down, very gassy and tired even after I wake up in the morning. Today im on my 3rd day of my furtal week, What could be wrong?