SOS PREGNANCY SCARE.

Valentina
I had sex on the 9th of this month and it was unprotected. He said he pulled out, and I saw he did but he had only a little residue. I took the Plan b pill a little over 24 hours but not close to 36. I'm scared it might not work. I have nausea and bloating. Is this normal? Should I be worried? PLEASE REPLY.