Possible pregnancy?

My husband and I have been TTC since February. Lazy weekend on the  26th we had sex. On Sunday the 27th I started my period, and it was 2 days early. I wasn't supposed to start I ok Tuesday the 29th. My period ended Wednesday. Now yesterday (Friday) and today be had really bad cramps. Yesterday I was also nauseous, and both yesterday and today I've been tired. Is it possible that may be pregnant? I thought it could just be ovulation cramping, but I've never ovulated right after my period before, and the ovulation cramps I've had have never been this bad. There hasn't been any spotting since my period stopped.