Levonorgestrel
"I posted last week after I took plan b, I promised I would write my experience if it worked and it did. Took the one called "take action" 26 hours after the "incident". Was absolutely terrified because I'm extremely fertile and it was on the day I normally ovulate, and I have never waited that long for the morning after pill so I was extra nervous about getting pregnant. My side effects were absolutely horrible and they are so similar to actually being pregnant it's insane. I was fine the first couple days, just makes my head feel weird and I get emotional, but days after I was super dizzy and nauseas. I started 2 days early and it's pretty bad, but better than being pregnant. Try to relax, pretty sure it works."