I've got invisible chronic disabilities too (cerebral palsy, sciatica and fibromyalgia), as well as invisible chronic illnesses (epilepsy, migraines, and asthma), and I feel for you. I've been accused of being a drug addict because I take carisoprodol three times a week and thoroughly enjoy the effects it has on my pain and tension. I've been told that I don't look sick or disabled, so I can't be. Sometimes the only way I can prove my disabilities is to flash my DC Metro Access card, which is proof of disability. I've had people scoff at me and bitch me out for being too fatigued to do something. When I am walking with my cane, I am treated completely differently, because people can see that I am disabled. It makes me feel so strange.