Hi there ~
I understand your concern. However, I believe that after taking three urine pregnancy
test, which I hope were done with different companies strips and with different times, I think that you may not have had a problem with pregnancy. I however feel like the cramps and headache after having sex is related to a condition called vaginismus
. You should consult a gynecologist to help with your condition. I hope this helps. Take care and have a lovely day!