its possible it is not all guarenteed
You cant take a pill to get pregnant ! Getting pregnant involves having un-protected sex !
It's not high risk, although you could.
It depends on what you were using as protection on day 21.
If any sperm are anywhere near the vagina, you can get pregnant. I have a 30 year old to prove it (no penetration).
You cant get pregnant after protected sex
its unlikely that u are pregnant since ur on birth controll and protected sex i wouldn't stress to much about that one
Tylenol and Benendryl should have no affect on the pill. You can have unprotected sex any day of the month if you are on the pill, you are protected with the pill from pregnancy.
No
If you are on the pill and have diarrhea there can be a disturbance in the process of the pill , so if you have had sex in the middle of the disturbance there is a possible chance you could be pregnant!
If by protected sex you mean a condom, then yes. The condom could break :( If by pill, also yes. They do not always work.
Easily if you had sex!
If you've had PROTECTED sex she wont be pregnant. Her period will be all over the place a few months after stopping the pill.