Missed periods and pain on the right side of your stomach can have various causes. While kidney stones and appendicitis are possibilities, conditions like hormonal imbalances and ovarian cysts can also cause similar symptoms. Seeking timely medical care is crucial for proper diagnosis and treatment to prevent serious complications.

Bleeding can be caused by a small vaginal area tear or an itching sensation. There could be various reasons such as bacterial infections or hormonal changes. People need to remain quiet, get hydrated, and relax. Moreover, sex should be completely avoided until it is diagnosed. 

Its unlikely that your partner would be affected by tramadol. Tramadol is a pain medication that works by affecting the brain and nervous system, and its not known to cause tingling or "zingy" sensations in the mouth or tongue.

PID is an infection of the female reproductive organs, usually caused by STIs like chlamydia or gonorrhea. However, PID can also be caused by non sexually transmitted infection, like bacterial infections, medical procedures, or bacterial imbalances. Regardless of sexual activity, PID requires medical attention for proper diagnosis and treatment.