I just saw this thread from a while ago;
I have been perimenopausal from 36-39 years old. This occurred over covid. Now not had a period for a year and blood tests confirm I have premature menopause. I am 39 years old now. 
Generally I am slim (especially on face and arms), but have always carried a bit more weight on belly. In the past 3 years the public I work with, 3 random people asked if I was pregnant or had recently had a baby. The irony.....I am childless and now know I can't have kids.
I was both gutted and annoyed at being asked those questions. If only those people knew what I was and am still going through.