Havin two periods in a month is not uncommon. The cause could be stress or hormonal imbalance. It's generally not dangerous, but consult a DOCTOR if concerned. 

The common causes of brown discharge and missed periods are pregnancy, PCOS, thyroid conditions as well as infections. A gynecologist or an obstetrician should be consulted for a proper diagnosis and treatment.

Taking abortion pills can make you bleed a little but it is usual to have some bleeding. If the bleeding goes away quickly and you have only a small amount of bleeding after, it can mean that the abortion is done. Just chill out and see how you feel. If you have intense pain, fever, or heavy bleeding, go to the nearest hospital without delay. 

Terminate a pregnancy at home without medical supervision can lead to serious health complications and not recommended. Please consult a qualified specialist for further guidance.

Greenish or watery breast secretions are warning signs of breast infection or a hormonal imbalance. It is advisable to see a gynecologist, for an accurate diagnosis and treatment. Do not wait for the symptoms to get worse and consult a doctor.
 

If multiple pregnancy tests have come back negative, you should wait a bit longer and take another test. If you still have concerns, consult a gynecologist for further evaluation. Stress and other factors can also cause irregular periods.

Like HIV, PID has symptoms such as pain, fever, and discharge. Does one mean there is also the presence of the other? The answer is no. Normally, PID is caused by bacteria and it can easily be cured with antibiotics. However, if you still think you might have gotten infected after all these explanations then don’t hesitate to go for an HIV test to be sure.