Iud removal

AN

So I went to planned parenthood and they told me that since I had unprotected sex yesterday they wanted to make sure that I was not going to get pregnant . I was doing a iud removal and getting a new one inserted . They told me I can take the morning after pill but also told me if I don’t take it I should be fine . I am getting my period next week do you think I could get pregnant if I don’t take that morning after pill? They also told me that my old iud should of released the hormones and I could possibly still be protected since the new one won’t be effective till 7 days from now. But do you think I could get pregnant? I’m nervous to take it just because of the side effects