 [ Symptoms ] does your chances of pregancy increase while on your period with birth control  i recently switched to taking my birth control continuously so i only have 4 periods a year i was supposed to have my first period this week but did not have it at all which could be my body trying to get used to the routine but if i have intercourse during that time could my chances of getting pregnant increase [ Disease ] hi the answer is not known so to give yourself a trouble free time just use back up condoms till your 7 days past restarting your pills but some women do not even bother to take a break but that as they say is another story so hope this helps you good luck