Thyroid Medication: 50mcg or 25mcg

Depending on your symptoms, it could be an implantation bleeding. However, to confirm pregnancy and rule out other potential issues, you should go see a gynecologist. I would suggest a visit to a specialist in obstetrics and gynecology for assessment and appropriate treatment.
 

Taking emergency contraceptive pill after unprotected sex may lead to the changes in the menstrual cycle including irregular bleeding. Yet, bleeding within a week of taking an i-pill could also be a sign of hormonal imbalance or other medical conditions. However, the best option is a detailed examination and treatment by a gynecologist.
 

There are a variety of factors that can cause a delay in menstruation. STRESS, WEIGHT, and PCOS are all common. PREGNANCY or menopause are also possible explanations for a late period. If you are SEXUALLY ACTIVE, it is recommended that you take a pregnancy test. Otherwise, it may be best to simply WAIT IT OUT. If your period still hasn't arrived after a month, it's time to CONSULT A DOCTOR.

Being slightly late­ for your period isn't abnormal, especially during stre­ssful times or bodily adjustments. The unprote­cted sexual encounte­r on February 7th, followed by taking eme­rgency contraception, could impact your cycle. That might e­xplain your delayed period. Re­member, stress, die­t modifications, and illness can also affect menstruation. If you're­ still worried, a home pregnancy te­st can offer clarity. 

These might be signs and symptoms of other health conditions like endometriosis or pregnancy complications. Consult a gynecologist for thorough diagnosis and treatment.

Conceiving with PCOS is hard, but it is possible with certain approaches. PCOS might cause irregular periods, weight gain, and difficulty getting pregnant because your ovaries make too many male hormones. Your doctor can prescribe drugs that help regulate your menstrual cycle and increase the odds of regular ovulation which can bump up your chances for conception. These medications work by balancing out hormone levels while raising the likelihood of successful pregnancy. 

Different causes of vaginal peeling, itching or discharge include infections and skin irritations. It is critical to seek a proper diagnosis and treatment from an expert.