Well in response to the comment above, until you for sure find out if you are pregnant do not take your BC pills because it can harm the baybee if you are pregnant. So just in case, use a condom. Now, yes you do have to ovulate to get pregnant. You can be fertile and the sperm can sit in your eggs and start to conceive but it will finalize on your ovulation date. Wait until your period is due, if it's a week late, take a test. Coming on and off of birth control while starting it early can effect your period. So this situation might be a little difficult. Be a use your period could end up being late due to going on and off BC, but just wait and see. Good luck.
Just a little fyi it takes 30 days for bc pills to actually take effect. The best thing you can do is to just wait and see if you miss your period next mth then take a test. In the mean time if you dont want to get pregnant I would suggest always using condoms along with your bc pills as nothing is 100 % effective in preventing pregnancy.
Also when will I start to experience symptoms? It had been 5 days since the unprotected sex so how soon after the unprotected sex will I experience symptoms