Implantation Cramping

I'm 7 DPO and have been cramping for 2 days... I had sex on the 7th of Feb, a day before ovulation, and the 10th. I've been exhausted and dizzy. I've been hormonal and today I've had headaches. Thing is I take the pill, (tricyclen) and my husband pulled out. Is it possible I'm pregnant? The reason why I've wondered is because the cramping is the same familiar feeling- with our 1st baby... It's been strange. Any ideas?