I had sex with my boyfriend about 4 weeks ago and the condom broke so I took plan b like an hour later. My period is a week late as of now and I've been having weird little cramps and a yellow/green discharge coming out of me since last week. Is this normal???

My period is usually a day early or late but not a week... Week and a half. And this discharge is kind of thick looks like dry cum (excuse my language) and I'm a little worried