Could I be preg?

My last period started 4 days early. Lasted for 3 days.  Mine usually last 5 days. Wasn't a heavy bleed like normal. Since then I've had abdominal pain especially when I lay on my stomach.  I've been losing 1lb per day for the last 3 days. I've been getting dizzy spells. My aereoles are just a tad darker. Could I possibly be pregnant?