Ive been really tired, some nausea, sensitive to smells, and cramping. Ive never gotten any period symptoms growing up. My most fertile day was the 17th of June. I had unprotected sex the 20th. The next morning I took the first tablet of the two planB pills.I only had the first dose.I had some thick brown discharge. My period was supposed to come the 26th and I just got it this morning, the 29th, but its really light. Ive read that some people still get their period, not knowing they're pregnant. As well, as some of my family members. It freaks me out. Help?

No form of birth control is 100% effective, including the plan B. Since you didn't take the proper dosage of the plan B, you up the chance that it didn't work.

The plan B can throw off your period, either making it come earlier, later, more than once during the month, heavy, light, or miss it altogether. So the fact that your period was 3 days late, isn't really unusual.

I know you're hoping we can tell you if you're pregnant. We can't. The only way to determine pregnancy is with a urine sample, a blood sample, or an ultrasound in later pregnancy. We don't have access to any of these online.

You'll have to wait, test, and see. Wait until your period is at least 2 weeks late, or 2 weeks after this bleeding that you don't know for sure is a period, then test using first morning urine. If that test is negative, wait for your next period, and if you miss it, test again or get a blood test done.