Hi there, just wanted to welcome you to the forum! Sadly I don't have a lot info to offer you, but I'm sure other members will soon offer you the help you need. There are some members over here who have applied to get this or are currently applying, so I'm sure someone will help you out soon! I just wanted to make you feel welcome and ask you to be patient
Have your doc complete a letter or form indicating an expected time away from work for appointments, flares etc., as well as information about fibro. Note that it is a recognized chronic disease. Can't hurt.