Help please?!

I'm 6 days late for my period and I'm a little worried, I already have a 8 month old baby and I don't think me and my husband are ready for another one JUST YET.
Neither of us believe in abortion but I am on the pill. I take it the same time everyday and my period is generally on time. I'm worried about how I should approach my husband with the news if I am?
PS I fell pregnant with my first on the pull and the doctor has put me on a new one to prevent the same thing happening again but I really don't understand how it could be in affective? I take it SAME TIME every day! 😪😭