Put those sleepless hours to good use volunteering at the Prayer and Crisis Referral Network. They are always looking for people to man the phones at all hours of the day and night. You can do this on your own phone from the comfort of your bed or couch. Set your own days and hours. They also offer texting prayer if you're not comfortable speaking to strangers.
Invisible Disabilities Association
Get involved in the Invisible Disabilities Association's online community. They offer support, encouragement, and education to people with invisible illnesses. You can also volunteer with them.