People don't see that your insides are a battlefield

They can't feel the awful hormonal headaches or horrendous nausea. 

They can't experience the feeling of your ovaries being ripped apart.

They can't feel what I can only describe as a knife being stabbed up your vajayjay.

People can't see you clench your legs together subconsciously because it feels like your uterus weighs 50kgs and is trying to escape your body through your hoohaa.