is there a chance

I started my flow on the 4th and finished on the 11th. It wasn't any normal flow it lasted a full week but seemed like a full flow. I have been felling generally not great this past week I.e. Feeling sick, not hungry (and I can eat for England), really dizzy spells, heavy in the stomach area and just generally strange. Could there be a possibility that I am indeed pregnant and had a full period? What do you think?