Thanks for posting your query.
From the information you have provided,
You are going through menopausal changes.
If your bleeding is more than 7 days or heavy or irregular ie in between cycles such that there is no pattern to bleeding , then you must see doctor immediately.
You will need a scan,
pap smear (if not done recently) & scan to look at the uterus and ovaries. You may be advised
thyroid testing also.
You might be advised further testing that is
endometrial biopsy based on the scan findings.
Burning inside the vagina and
frequent urination might be due to vaginal and or urinary infection. If you haven't checked for
diabetes recently, its better to do that along with the treatment for infection.
All the best, Hope I have cleared your doubts!
Please, do not hesitate to contact me for further queries.