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It could be both. 2 weeks after taking Plan B you always have to take a pregnancy test. Or you need to see a doctor.
Plan b all day
no. Plan B is very powerful and if you took it immediately afterwards, you will not get pregnant.
Yes you can take cold medicine.
Your menstrual cycle basically reset after you took the Plan B. Wait a month from your last period, not from your normal cycle.
I took plan b one hour after sex and I ended up pregnant. But if you have your period, you're probably ok. Mine wasn't even late yet and I went to the doctors because I felt sick, and that's when I found out that I am pregnant.
When this happens you need to take Plan B if you have unprotected intercourse. You also need to use a condom for 4 weeks.
72 hours
It can never hurt to be safe. If you have access to the plan B and cannot get in touch with your doctor, then take it to be safe. Having unprotected sex is not advised, even when you are using the NuvaRing, as it does not protect against STDs.
No you wont be protected. It's advised you take Plan B and use a condom for 2 weeks.
If you took the pills correctly in the prior month, you are still protected during the 7-day "off week" from the pills, and Plan B isn't warranted.
The half-life of plan B is a couple of days. It will not provide protection, though, for sex you have after you take it.