Hi Heather, welcome to the boards! With Fibro different people respond differently to therapies to deal with the pain. Do discuss with your doctor your pain levels & stiffness(?) in the mornings and an overall "plan" to help you to be able to function better. Doctors sometimes will do a combo of things like pool therapy, medications like muscle relaxations and or pain pills. Just depends - the exercise component is really important. For over the counter pain meds I found Aleve/Naproxen Sodium to work the best when I didn't have something else.
Has your doctor offically diagnosed you with having Fibro? That's the key part. Especially if you are planning to apply for disability. Also keeping a daily diary of your symptoms. (This is also great to take with you to the doctor's office).
There is also another board here listed as "disabilties" that deals more on that topic. (Also not sure if your referring to a state short term disability program or social security disability. Many states do have programs besides SSD. Applications for both are online & there's a wealth of info as to what they will require listed on their site).
Hope this helps to answer some of your questions - Fibro is a difficult thing to deal with & you have a lot on your plate with 2 wonderful girls. Hang in there!