If i am at tanner stage 4.2 (approximately) and i'm 5'3.5", how much can i grow, if at all?

Well : Most women have reached their maximum total adult height by age 16 to 18. You might grow another inch but probably less than an inch or no more growth in height. Consult endocrinologist for specific advice and treatment

Not much at all: The most definitive test to get is the bone age wherein an X-Ray of your wrist and palm and fingers is taken and then compared to age and sex matched controls. That will tell you how much potential growth you have left in your skeleton. Most women stop their skeletal growth about 2 yrs after their first menses. Then there are hi heel shoes and vertically stripped clothes.Read The Serenity Prayer.