I Had Unprotected Sex On 3rd Jan.. He Said Tht

I had unprotected sex on 3rd jan.. he said tht he was sure tht he didnt ejaculate nd i started to bleed on 4th jan..it was a 5 days normal period.. bt i had a period scheduled on 22nd jan... so is there any chance if i hv become pregnant due to sex of 3rd jan.. i didnt had sex after 3rd..