Hi, don't worry this particular mistake will not increase your chances of getting pregnant. But you should be very careful while taking pills in future, and repeated mistakes may decrease the efficacy of the pill. You cannot substitute the pills for each other and expect the same efficacy. In addition pills, even if taken regularly & correctly are not 100% effective (like all other methods of contraception
), so it is better to combine them with a barrier method ( e.g. condoms). Take care.