Wait at least two weeks before you can start testing yourself.
wait till a few hours or the day after you had sex and get a couple pregnancy tests.
Yes, if you forget to use a diaphragm for a day and have sex on that day you can get pregnant.
yes, you can get pregnant on the first day of your period. there really isn't anything you can do about unprotected sex. maybe the day after pill? but it properly wont work if your already pregnant.
3 weeks after sex at the earliest
You can find out you are pregnant 14 days after you had sex.
Yes
As many times as you want. Sex is encouraged during the end of the third trimester!
You can get pregnant any time you have sex regardless of when your period was. To find the most likely time when you will get pregnant count back 14 days from the first day of your last period. One month from that day is the most likely time to get pregnant.
yes
The pregnancy test can be reliable 2 weeks after sex.
YES. Even if you're actually on your period, you can get pregnant.
if you have unprotected sex you can get pregnant. Period.