Missed three microgynon pills due to lost packet unsure how many pills were left

Patient: I’ve been taking microgynon 30 pill for the last 4 years and have never missed a pill untill now. i lost my pack and havent taken a pill for 3 days as i’ve been away, im also unsure how many pills were left in the pack but im pretty sure it was less than seven. Im really confused on what i need to do now?

Doctor: