Coming off the pill

Hey ladies, I'm new to the forum but I'm just here for some advice. I'm with a new partner and we have decided to try for our first baby together however this will be my 3rd pregnancy if it happens. Anyway I started my pill this month but after talking we decided I would come off it I was only 5 tablets into the pack. It's now been 3 days and what would normally be my fertile week I now have breakthrough bleeding ...anyone know how this would affect my chances this month my last period was Nov 10th and I have a regular 28 day cycle. What my concern is that the breakthrough bleeding could affect an egg from fertilising? Or am I just thinking daft ? And better waiting till next month ?