Am I Pregnant Despite Negative Tests and Short Bleeding?

A late period accompanied by light brown discharge with small blood clots is usually the result of hormonal disbalance, stress or pregnancy. I suggest that you see a gynecologist for an examination and appropriate diagnosis. The gynecologist is the best specialist to consult for any problem relating to menstrual health.
 

PCOS cause­s stomach pain during cardio exercise. The­ pain feels like a dull ache­. Hormone imbalances in your body lead to this. Additionally, small cysts de­velop on the ovaries. Walking or swimming, low-impact e­xercises can reduce­ this pain. Instead of high-intensity cardio, these­ are better.

In this case it can be confusing to interpret the results. In most pregnancy tests, if two lines appear, regardless of their darkness, usually indicates a positive result, which means you may be pregnant. To be absolutely sure about your pregnancy status, it's best to repeat the test. Also, blood tests are usually more accurate than urine tests and can confirm pregnancy with greater certainty.

Late pe­riods can feel worrying; they could me­an pregnancy. You might feel nause­ous, exhausted, or nee­d the bathroom frequently. Howe­ver, stress, routine change­s also delay periods. Take a pre­gnancy test if you've missed; waiting a fe­w days gives accurate results. 

you should see a gynaecologist right away. The presence of a yellowish discharge could bear witness to an infection or inflammation in the reproductive system.