Suggest Dosage For Miccrogynon 30ed

I have just returned from holiday and realised i have left my miccrogynon 30ed in the bathroom. I can't remember if I was on the 2nd or the 3rd friday of the pack. I am unable to get them but I have a new packet here at home. Should I start again at the beginning of the pack which would have been a Thursday? Or start the new pack changing the starting date to a friday? Either way, starting again means it will delay my period for a while? What shall I do? Thanks