Missed pill

today was supposed to be my last pill before break. I just realized as I was taking my pill I had one left and missed one during this week. I’ve had such a busy week I can’t even recall when but have had spotting for the past 2ish days so that makes sense. Do I need backup methods for the rest of the week, is this a big no no? do I double up tonight and start a new pack tom? This is the first time I’ve missed a pill in three years so don’t know how bad this is or if I am fine.