You are going through a tough time with stress and sleeping troubles. Stress can interfere with sleep, and in some cases, it can even worsen illnesses such as asthma and anxiety. The most common cause of insomnia is stress. You can try relaxation techniques like deep breathing, gentle exercise, and avoiding caffeine or screens before bed. 

If you miss a period for more than 3 days, it may be implantation bleeding as well as a medical condition. A gynecologist should be consulted for a thorough examination and diagnosis. The gynecologist or an obstetrician is the best consultant on such conditions.
 

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. 

You didn't mention the pregnancy test and also even if it is possitive, you need to see your gynecologist. They can ask for some tests and confirm about pregnancy or any other health conditions