How long after taking a morning after pill should I expect my period?

Of course it should be realised that even the morning after pill is not 100 percent effective ( a fact not always quoted) and they of course do not protect against any STD.

Only one study has been specifically designed to assess the effects of progestin-only ECPs such as Plan B on bleeding patterns. It found that when taken in the first three weeks of the menstrual cycle, ECPs consisting of 1.5 mg levonorgestrel in a single dose significantly shortened that cycle as compared both to the usual cycle length and to the cycle duration in a comparison group of similar women who had not taken ECPs. The magnitude of this effect was greater the earlier the pills were taken. This regimen taken later in the cycle had no effect on cycle length, but it did cause prolongation of the next menstrual period. The ECPs had no effect on the duration of the second menstrual cycle after use, but the second period was prolonged. Intermenstrual bleeding was uncommon after ECP use, although more common than among women who had not taken ECPs.

You should have another, normal period within the next month. If not, you might consider getting a pregnancy test just to make sure you're not pregnant.

Welderchick, keep in mind that the morning after pill is not a single pill, and doesn't necessarily have to be taken the following morning. The usual treatment is two pills taken as soon as possible after the unprotected intercourse, and two pills taken 12 hours later. It can be taken up to 72 hours (3 days) after the unprotected intercourse, although the sooner it is taken, the more effective it is at preventing pregnancy. Although the hormones used in morning after pills are also found in birth control pills, the amounts are different. The morning after pill can cause your cycle to be early on-time or late. You may also experience minor changes in your menstrual flow. It could be heavier or lighter. You should talk to your doctor before making any decisions.

I had unprotected sex Wednesday night and went the to the doctor Friday afternoon and took the pills once at 12noon and then the last two at midnite. I guess I was expecting my period to start Saturday or Sunday with the pills but I suppose its different for everyone.

If your period takes too long to start, then contact your doctor and let him/her know that you haven't had your period since you took the morning after pill.