Hi there
I had protected sex with a condom on on day 6 of my cycle. The condom did not break and was worn properly such that there was space at the end to prevent breakage.
Taking all precautions above - condom and day 6, I am still paranoid even though I know that my 29 day cycle is regular and I will ovulate in the coming week.
Thank you to the good people at Empowher, it's great that a community like this exists for women and girls on sexual health information.