There is no need to worry about the decreased efficiency of the pills so long as you take them regularly. The change in the timing does not affect the mechanism of action of the pill. Also, you need not go for the emergency pill as you started your new pack right on time. In fact, use of emergency pill should be restricted to 1 or 2 times a year as it is definitely going to impair the regular hormonal
balance of the body and therefore, fertility
issues are bound to occur later on. Take care.