question: Hi there, I always have irregular periods. Now it's been 36 days when I finished my last period. We are trying hard to get pregnant for last six months by having sex every alternative day.  I feel severe back pain, dizzy, craving for food, and pain in my legs. I just had a HPT it came out negative... could you please help me why am I having severe back pain and body ach for last 10 days?