Ok, one thing, a male makes billions of sperm every few hours, even if there sat around doing nothing.
There is sperm in pre-cum, so even if he never ejaculated, there is still a risk of being preg.

Yes there is less chance of being preg, straight after your period, but it does all depend on the legnth of your cycle, and when you ovulate, which unfortunatly, I cannot tell you.
I would say the chances of you being preg. Are very slim.

You can take the morning after pill, up to -i think- 48 hours, it could be 72 hours, after you have sex.
If not, wait until your next period is due, and dont stress - I know its hard- because stressing will delay your period, even if you are not pregnant.
If your preiod is delayed, try to wait until one week after your "missed" period, before taking an hpt test, for a more acurate reading.

Advice-
use 2 methods of birth control. So that way, if one fails, like just happened to you, you will have a back-up.
And always use a condom, to prevent stds.

Good luck :)

Yes...You need to get on bc pills or something so when something like that happens it's lowers your chance of getting pregnant! If you have a regular cycle then chances are you aren't pregnant, but it's not always certain! Good luck!

The biggest thing is to try not to stress about it. I really don't think you have anything to worry about, so just relax because stress can make your period late. :)

Well . One its to early as you probally already know to tell you if your pregnant or not.. But there is always chances of being pregnant with or without protection. If you really think that there is a possibilty that you are.. Call you physician and he can give you a pill to take that will decrease your chances.. Good luck to you