weight gain from medication, metabolism fucked?

22 female 5’3, have always been naturally really slender even underweight most of my life. only after i gained a few pounds over the course of four years have a actually been a good healthy weight at 115. i recently had a really bad ear infection in both of my ears that almost led to tubes being put in. never had problems with my ears growing up so this was out of the blue. i had the infections for a good four months and was on steroids, antibiotics, and antifungals the whole time. since those meds, my metabolism got fucked and i went from 115to 135 in a matter of a few months. as a result of the fast weight gain i have red and purple severe stretch marks all over my legs. my thighs, calves, knees, buttocks, literally all over my legs. i was never over eating it just changed the way my body metabolized food. it’s the first time i’ve ever had stretch marks or ever weighed this much.

this is a tough subject for me and after being out of work while i was sick with this, i came back to work and everyone has been asking if i am pregnant. it’s awful and my self esteem has gone way the fuck down. is my metabolism fucked for the rest of my life? i am starting to diet and eat less and exercise but is watching what i eat and constantly eating far less than my TDEE something i have to maintain for the rest of my life because i no longer have a high metabolism from the meds? i’ve really been having a hard time after being back at work with all the guys thinking i’m pregnant and all the girls whispering being my back about my weight gain. does anyone have advice or gone through something similar?