I recently cut six inches off my hair; I went from having long hair to rocking a lob, which is a bigger change than you might think. The drastic cut forced me to research different ways to style the shorter do. But I love it, have no regrets, and I've.
The sun will rise again tomorrow, so if something didn't work out today, try again tomorrow or the day after. With chronic illnesses, fatigue and pain will often change or limit your plans. Don't worry--let it go. There's still time.