"you look to young to be pregnant"

I'm so sick of people judging me!!! 
I'm only 5ft and I do not look 21 I agree 
I get it all the time, and I'm sick of it it's eIther that or your massive for "..... weeks" 
How can I deal with these people 
It's getting me down
We have tried for 2 years for this baby, with 2 losses in between.
Making me not enjoy my pregnancy :(