My girlfriend and I had intercourse a month ago with a condom but I ejaculated in the condom and continued. She got her period on time that month. This month me and her had protected intercourse a couple of times but 2 days before her period was due, we had unprotected sex for less then 5 seconds. Now her period is 3 days late. She mentions that her breast didn't get tender a day before her period was due which is unusual for her. She had random backaches a few days ago but now it has stopped. She is also experience no other pregnant symthoms. She also sometimes have irregular periods so I don't know. Im wondering if she's late this month or what are the chances of her being pregnant

Don't know, nor does anyone, by protected sex I assume you mean condoms, of course I am sure you know they have a 3 to 10 percent failure rate so they are not nearly 100 percent effective. And since you are having regular sex, she needs to also be on a form of birth control also to help reduce the chances.

So could she be, of course she could be, is she, no idea, you will need to wait maybe two more weeks and if no period, have her to a home pregnancy test first thing in the morning.