Dealing with Chronic Illness and Income Protection Insurance

Hello! Does anyone have experience of being on income protection insurance long-term? I know I’m in such a fortunate position as my company offer it as standard, but I can’t stop feeling so guilty… I’ve stopped posting anything about my life on social media and don’t like to go out much in case my co-workers see me and think “how can she do X and not work?” I work with computers but have chronic migraines, fibromyalgia, ADHD, and bad anxiety. I returned to work for a brief time last year and it made everything (especially the migraines) flare up again and I missed a lot of work before having to go off on long-term sick all over again. I’d love to hear how other people deal with this. I loved my career but just can’t find a way for my health issues and career to co-exist. Thanks!