In general, abnormal discharge is a sign of health problems with parts of the reproductive system but is most likely associated with infection. I'd suggest that if the vaginal discharge returns, you go see a gynecologist.

Only a pregnancy test can confirm whether or not you are pregnant.

Was it blood? If so, that could be implantation bleeding. But you said two weeks after your period, so its possible you had some spotting with ovulation. Take an HPT to make sure. Good Luck!