What does this mean? And what should I do if anything?

Frequent discharge: kind of watery, sometimes its thick and sometimes has a yellow or brownish color, sometimes white. Sometimes there is a streak of blood in a clear thick dischare, but that is rare. Its not at all painful. Urination is not at all painful. Sometimes there is an odor. It doesn't feel like a yeast infection. It doesn't feel like there is something wrong. I've experienced this on and off for several years between 19 - 23 years old. My pep test is fine. Should I be concerned? Is this normal?
I work a lot and think this might be stress related. But, since i've had this for a few years, on and off, i've considered it to be normal for my body. Please let me know if this sounds like anything, or if others have similar experiences.
Thank you,
ness