Pregnant? Any advice for the situation?

So on the 17 I had sex with my SO and he came inside me, I understand that it was irresponsible but it already happened. I took the morning after pill in the morning the following day. I was supposed to start my period on the 20th, but so far it’s the 27 and nothing yet. I have tender breasts and I feel like I could start any moment but I’m not sure if it’s pms of early signs of pregnancy? I do think it’s to early for pregnancy signs. Also my period has been out of wack since I had my IUD removed like 2 months ago. What do you guys think? Do you think I’m okay?