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have been on the birth control "Tri-Sprintec"

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Hi, I am 17 years old and a little confused. 2 weeks ago I had protected sex with my boyfriend, and I have been on the birth control "Tri-Sprintec" for a month and a half. My period is supposed to come soon, I have just began the white pills today, but under my armpit my breasts are really sore, not in the nipple area but just underneath my armpit and under my nipples hurt extremely bad, they are also showing tiny veins on the right side. I'm confused to what this might be? Could this be pregnancy signs or just normal breast pain? I'm scared since I have no access to a pregnancy test. Also, I am worried that I will not get my period, but I usually don't get my period on the first day of my white pills anyway..

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replied April 19th, 2011
Am I Pregnant Answer A22105
Welcome to ehealthforum,
If you had been regular with your birth control pill use and have not missed taking any pills, and if the intercourse was while you were on the second pack of the birth control pills, then you should have protection against pregnancy. Wait and watch for your periods. They should start by the time the placebo pills are over. Start with the new pack as scheduled. The breast pain/mastalgia could be associated with period time hormonal changes. If they continue to be sore and the veins are getting prominent, or if you develop any other new symptoms, then consider getting a pregnancy test done. Visit your gynecologist/doctor for examination and tests to confirm/rule out pregnancy. If pregnancy is confirmed, or suspected, stop the birth control pill use.
Take care.

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