Morning after pill

Hello I had sex about 17 days into my cycle and I have no clue when I ovulated but my bf came in me..not something I let him do but he "forgot" to pull out. I took the morning after pill the next day and now(after being a day late) I have what I believe is my period but it really just looks like spotting and is a really light red color. He wants a pregnancy test but I think we are fine since it was only a day late and yes its kind of just spotting but its still something and has lasted 5 days so far. What do you think? Advice and help would be much appreciated.