I had sex last Saturday night, which was during my fertile period. The man I slept with used a condom but took it off before ejaculating on my body. I took the morning after pill. Is there a chance I could be pregnant?

There will always be a change of pregnancy when you have sex, even when contraception is used. The morning after pill is pretty effective, but also not 100%. Odds are you won't be pregnant, but you'll just have to see what happens when you would expect your next period.

Yes of course, there is a chance, but it is a very small. I would say, that most likely you are not. But condoms are not 100 percent effective, so it is possible.

Also, what you believe is your fertile period may or may not be your actual ovulation time. That can happen at ANY time in your cycle. The only way to know perfectly is you start tracking your basal temperature. All the phone apps and online estimations are essentially useless for accuracy.