Curious Question

Natasha
So I had my IUD removed yesterday and was told that I am extremely fertile btwn now and March 23rd. Anywho, my husband and I had sex last night and I wasn't supposed to start my mini pill till today, but I am afraid that if I did end up pregnant from last night and I start taking my pill, will it affect the baby at all? I didn't take the pill because I'm unsure.