What happens if I miss 5 days of the first week of my pill???

Em
So I'm on birth control but in the moths of June and July I'm gonna be out of the country and my insurance isn't letting me be able pick up more than one month's prescription, so when I leave I'll only have June's pack. The thing is that by the time I come back and pick up my July pack, I'll have already missed 5 pills of the first week of that pack. Can anyone please tell me what will happen or what I should do when I come back and I've missed those 5 days?? 
THANK YOU!!!