Do i need to go to a doctor to get subscription for yeast infection?

Maybe. Maybe not.: Depends on which yeast or fungus, which part of the body (any body part can get infected), which antifungal drug, and the local rules that decide which drug is over-the-counter vs. prescription-only. For example, if you pay a pharmacy to send you over-the-counter GyneLotrimin every 3 months (that's what's called a "subscription"), for occasional treatment of candida, no prescription is needed.