How possible is it for me to get pregnant 11 days after my period started?

I had on 21 Mar and the condom broke, so everything ended up inside of me. i really tried to take precautions but didn't expect that it would rupture. Now i'm really worried if i could get pregnant if my period started 11 days before that... have I ovulated by then?? Right now, i feel giddiness and queasy... i don't know if it's morning sickness or just a psychological reaction. Please help!