I'm not on birth control, and we didn't use a condom, this is stupid I know, but I took plan B within 20 hours, but I'm about 3 to 5 days late, I don't feel sick in the morning, but I did feel exhausted yesterday, should I be concerned? Should I wait a couple more days before I get a test?

Did you take both pills, one within 72 hours (which you did do) and one 12 hours later?

I personally would take the test if you are normally regular.

Yes, you should be concerned. You should be concerned about pregnancy every time you have sex, protected or not. Accidents happen. If you don't believe me go over to the legal Family Law board and see how some of these situations work out.

should i be concerned?

I'm not going to lecture, but I would be concerned that you're having unprotected sex when you're not ready to have a baby. I have friend that have gotten pregnant even while on the pill or using condoms. Better be careful.