Scared out of my mind

Keziah • I'm 19, and this is my first baby. his names Grayson💙💚

so this morning me and my SO had sex and he ended up coming in me a little bit which he NEVER does cause he can control it and just looked at me scared and asked if my birth control (I HAVE THE MERENA IUD) would work.....so ladies ....do you think I could get pregnant with the IUD. I have an almost one year old 😭