Please help me...

Ashley
I've posted this once but didn't get any replies..OK so we have been TTC and I am currently 5dpo. Well this morning when my fiance and I had sex, I started getting these pains in my lower abdomen but nothing serious. Well when we finished the deed and he pulled out the pain intensified by like 100. I laid there for over an hr in so much pain I couldn't move. I was dizzy, nauseous and my head started hurting. Now ever since (its been about 12 hours now)its like a constant cramp that won't go away I'm still getting very dizzy even if I just turnmy head to fast bowl movements hurt and myback hurts. Has anyone ever been through this? Could this be implantation?? Very worried. Thank you! Also no bleeding at all.