Our expert says:
Some of the symptoms you are describing sound much like a urinary tract infection - urge to wee, burning, lower back pain. It may be that you have a urinary tract infection - this may have been contracted during the unprotected sex before, or may have developed for other reasons. Whatever it is, it is important to check this out and have it treated. The irregularity of your period may be due to your body adjusting to the birth control (the pill?), but when you have the urinary tract infection checked out, just run this by the health practitioner to be sure.
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