I Have Had Thick Yellow Discharge That Went Away But
Probably related to infection.
Yellow vaginal discharge could be due to an infection. Even the spotting after periods could also be due to infection until unless a gyneac check up is done including an ultrasound scan.
Feel free to ask your doubts with more details like your age, weight and height , married having children ,associated with any other medical diseases etc.
If there is infection you and your partner has to take treatment together and avoid sex for one week.
Always a speculum examination by a gynecologist would be better to identify the cause and permanent eradication of infection.