Hormonal imbalance or other factors can cause period problems and a gynecologist should be consulted for an accurate assessment and treatment. Coxicam, meloxicam, zune, esomeprazole, ms. futine and fluoxetine as HCI USP are out of the question for menstrual issues. I'd suggest going to an expert in gynecology for the management of period problems.
 

You might have the symptoms of a common medical condition, yeast infection. This may be signified by your typically producing white creamy discharge. The pain and over-fatigue in your body can also be responsible for this effect. Of course, there are over-the-counter medications that you can buy at the pharmacy which are the most effective and usually quick remedies for the condition. Also, keep wearing lightweight and breathable clothes and avoid anything with a high sugar content to help your body fight the infection.

The probability of pregnancy from the situation you described was quite low because you took the necessary measures after the unprotected encounter. Although light bleeding might have been caused by the pill's side effects, like irregular bleeding, this is not a sign of pregnancy. This idolizes the truth that hormonal changes can cause such and such. It is common and does not mean you are pregnant. If you're worried, taking a pregnancy test can provide reassurance. 

The pain in the bottom right corner of your belly near the private area could be due to several causes such as appendicitis, ovarian cysts, urinary tract infections or pelvic inflammatory disease. It is very important to see a gynecologist or urologist for the right diagnosis and treatment.
 

chance of a successful pregnancy could be low. A tied tube reversal procedure may be required planning for a baby, but it requires checkup to confirm

Abdominal pain, lower back discomfort, and irre­gular discharge during pregnancy raise conce­rns. Such symptoms may signal potential infections or problems. Promptly contacting he­althcare providers proves crucial. The­y'll likely evaluate you to pinpoint symptom cause­s. Appropriate treatments aim to safe­guard you and your baby's well-being. 

Check for any changes in your baby's fetal movements, becuase it can decrease its oxygen supply. Contact your gynecologist immediately.

These kinds of changes could be caused by hormonal imbalances or conditions such as endometrial hyperplasia. 22mm is concerning and needs further evaluation through biopsy to rule out anything serious like cancer. Because of her age as well as her overall health status, these tests must be done.