Discharge colour concern

For as long as I can remember I’ve had light yellow light green sticky discharge with a tangy smell (not a super strong smell) and after seeing people discussing discharge colours I have become concerned I may have a std or another type of infection.

My boyfriend and I are each other’s first and neither of us has slept with anyone else. I’m on the pill and we have unprotected sex (I always pee after sex)

I don’t experience any other symptoms related to std’s or infections such as burning during sex or during peeing and I’m not itchy at all down there (and if I am it’s due to hair growing back) my discharge colour is the only “symptom”

Any ideas on what this could be? Is this potentially an infection or std? Or is it normal to have green- yellow discharge and not have anything wrong?

Thank you!