Hi.
First of all, perimenopause is experienced by many woman who cross the age of 40 years, so it is not completely true that you cannot experience it till you reach the age of 60.
Next, your symptoms are that of an infection, and if you are treated adequately for the same, then most of your symptoms shall subside. Menstrual irregularities,
frequent urination, etc; are all symptoms of the infection. Please complete the course of treatment and avoid sexual intercourse during the course and for at least 7 days from the completion of the treatment.
Your
constipation is a different problem all together and will have to be tackled with a strict high-fiber diet, lots of fluids and please do consult a nutritionist regarding the same.
As mentioned earlier, you can easily experience symptoms of menopause at your age. So yes, you could be perimenopausal, but I would only suggest this after completely and adequately treating your infection; after which you could write to me with your prevailing symptoms after the infection has been adequately treated and we could ascertain your menopausal or perimenopausal status.
Hope this helps.
Take care.