### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, I dont know if Im actually talking to a real doctor but I have an urgent question. I have been on my birthcontrol (Tri-Sprintec) for about two weeks now. I previously had been on it for a couple years but just recently started using it again. Through the two years I had never gotten pregnant...even though My partner and I never used any other kind of protection besides the birth controI. I had unprotected sex about twelve hours ago and have heard that you can take 2-5 birth control pills to be used as an emergency contraceptive. Im wondering if this is true, how many pills of the tri-sprintec should I take?Thank you, I hope to hear back from you soon.-AAAAA

### output:

Hello Sky and welcome to Chat Doctor. Thank you for your query. Tri-sprintec is a birth control pill that has to be taken as advised by your doctor, not more, and not less. The usual instructions include taking it on the first day of your period, and then taking one pill a day. The 28-day pack contains 7 pills which are called the reminder pills, while you are on these you will experience your period. Please do not take any extra pills, one pill a day is more than enough to prevent a pregnancy. As you have already been on the pill since 2 weeks, and hopefully initiated it on the day your doctor has asked you to, and provided you have not missed a dose, then there is usually no requirement for you to have any other pills or extra pills. At times, we do advise one extra method of contraception, like the use of condoms, as there is a 2-3 % chance of failure of this form of contraception. As you have been on the pill, and provided you have taken it the day you had unprotected intercourse, you need not take any extra pills. So please, rest assured. The one pill a day course, is more than sufficient. I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://doctor.ChatDoctor .com/doctors/ Chat Doctor.  I would gladly help you. Best wishes.