Stop birth control pill halfway, had unprotected sex, a week later I got my period can I be pregant?

Last month I stopped taking my birth control pills on week 2 and my husband and I had unprotected sex because we want to get pregnant but a few days later I got my period. It lasted about 4 days and it was very heavy. Now its been 3 weeks since my period and I have been feeling really tired and I need to pee like every hour. I want to find out if even though I have had my period I could still be pregnant since we had unprotected sex only days before I got my period. Please help me.

Thank you

http://www.plannedparenthood.org/health-topics/pregnancy/how-pregnancy-happens-4252.htm