my cycles are 32 days long, very regular and i use a calendar based contraceptive method that worked for years.
i got my period on august 1st, had unprotected sex on august 10th - so day 10 of my cycle, not perfect but not too bad, but i was paranoid and took plan B on day 12 of my cycle (i was away and couldn't get any earlier). i felt what i thought was ovulation on day 19, completely forgot that i took the plan B and had unprotected sex during my "safe" time, which is last night, day 24. then suddenly remembered that i took the plan B and now i'm afraid that it was not safe at all and that what i felt was ovulation were just cramps. i forgot about the pill because i didn't experience any of its side effects.
does the pill really change your cycle that much, even if you take it so long in advance? anyone has experience with this?