So we had sex 4 and 2 days before ovulation and now I'm 8 dpo and I've been having cramping on and off on both sides on my lower stomach along with lower abdominal pain and lower back pain again off and on. I've need really tired and taking naps though out the day (s), I'm been my hungry then usual and have been getting more headaches. I tool a test yesterday 7 dpo and it was negative. Also I just had our first almost 4 months ago. Opinions please.