I don’t know your full medical and sexual history so I am unable to give specific information about what could be happening, but I can give you some general information based on what you have written.
It is possible that an STI like chlamydia could cause symptoms like this, but at the same time these symptoms can be caused by non-STI things as well. Hormone levels, birth control side effects etc…
I would just recommend going to see a health care professional that could review your medical/sexual history, do an exam and do some testing for you.
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