Fibromyalgia and weight loss... help!

I am a 53yo mother of two grown children who was diagnosed with Fibromyalgia 15 years ago. My care was mismanaged, not because of ineptitude, but because so little was known about the illness back then. I was put on every conceivable medication that might help including a very strong narcotic. I was literally a zombie. If it hurt I did not move it. Soon depression set in and I took to my bed. I literally did not get up except to go to the bathroom. I took my meals in my bed and had my family take care of me.
Then my beautiful daughter-in-law told me she was expecting my first grandchild. I knew I had to make some changes. My first big change was to quit smoking. I kicked a 2 pack a day habit cold turkey. I thought.... If I can quit smoking that easily, maybe I could get off the medications that were making me so depressed and lethargic. And I did! And I tried to become more active. I started sitting up in a chair during the day instead of lying in bed. And i began cooking meals so I could eat a bit healthier, not that I knew anything about nutrition at that time.
August 6th 2013 I began having chest pains of such intensity and duration that I finally went to the hospital. I had for years avoided doctors because I felt I could do better with my care than just having pills thrown at the symptoms, I mistrusted doctors totally. Although my heart turned out to be okay, I had the beginnings of some serious medical problems developing all because of my weight. My blood sugar was elevated, my blood pressure was high, my depression was severe, my blood oxygen levels were extremely low and I had sleep apnea. Add this together with the never ending list of symptoms that come along with Fibromyalgia and I was a mess. I weighed 317.5 pounds.
When i got home, I vowed to do something about my weight. I bought a recumbent bike because i was unable to walk, I bought dvd's and weights. I bought books and watched tv shows. I lost 30 pounds. I was so proud of myself and I became lax. I stopped riding my bike because my pain levels in winter are so much higher and my flare ups are so common. I started snacking at night. And 2 days ago on my anniversary of my hospital stay i got on a scale. I had gained 3 1/2 pounds. Not much you say.... but for me it signaled a trend that i was familiar with.
Yesterday I cleaned off all the clothes from my bike and i tried riding it. I only lasted 25 minutes... I was used to doing 30 mins 3 times a day when i was losing weight. I gave myself a million excuse why i did not want to get on that bike... but i did it... and even tho my legs were rubber it felt so good! All that adrenalin pumping. And today, even tho i did not want to do it I got on that bike and i pedaled for 30 mins, and i was so proud of myself.
Tomorrow I am going grocery shopping. I have gotten rid of most of the junk food from my house and intend on replacing it with healthy low calorie alternatives. But, I am the one doing the shopping for the first time in a long time.
For the first time in many months I am encouraged to try again to lose half my body weight. Today i am 288.7. Today begins my journey. I am looking for others who suffer from Fibromyalgia or other pain related illnesses to join me in my weight loss.