Plan b side effects!

Last week I had sex with my boyfriend and had to use plan b. It hurt for a while, like 2 days and then I got the other side effects. Now my question is when you took it did the side effects last a week after you took it?
​Also I had sex with my boyfriend again last night til my vagina was sore and I woke up to a lot of blood is this spotting or am I dying?