How early could I feel pregnant???

Jen

Hi guys. I'm 31 and trying for my first baby. My husband and I have had sex for a full week. My ovulation strip said I was ovulating Sunday so continued with sex that day and Monday. I honestly feel sick as a dog today - Tuesday. Cramps in my right side and then sharp stabbing pains later in the day. I was also dizzy. Could I have caught earlier than ovulation day? Could this be early signs of pregnancy??? HELP