I'm so upset . what should i do?

I'm a male and I have always been very worried about my appearance.. I've always felt ugly, etc. I'm in my early 20's btw. Anyways, I was getting ready for work today and overheard my stepmother (who I don'tget along with) and her son saying "He's so ugly.. he looks like an ogre" .. and then my stepmom said "well think about how he feels".. I was so upset and hurt.. of course I didn't say anything, but I felt like I almost couldn't go to work. How should I feel and what should i do? I know it sounds stupid, but I'm already so down on myself and that hurt so bad.