I have struggled with this a lot since puberty (I'm now in my mid 30s), mainly in social situations like in bars or house parties. Sometimes I feel so big and ugly (like an ogre), I feel too big for the space I'm in- it's so strange and hard to describe I guess. What helps me the most is that I've removed a lot of mirrors from my home & I don't look at my reflection in other surfaces when out & about, and I set aside at least one evening a week to take a long bath, do a face mask & paint my nails. I don't feel pretty but I don't feel so ogre like.