Hi there, welcome
I empathize with you when you talk about how people poo-poo your having Fibro. I have had Fibro for 11 years and still come across people who say that I look fine and how could anything be wrong.
I had to stop working since I was getting to the point where I was afraid I would make a mistake. I also got to the point where physically I could not do it. Luckily, I was able to get disability.
As Sunshine said, having a doctor who believes you have Fibro is very important. Hang on to the doc who believes you have fibro and is sending you to different specialists. It never ceases to amaze me how so many doctors lack a good bedside manner. Try not to take it to heart.
There is no age limit on getting Fibro, IMO..People will also say things such as it is in your head...it is hard to hear and I know it hurts. There are a lot of people that unless they see something concrete they believe there is nothing wrong. If you hurt, you hurt.
Why is your blood count off? I would definitely try to get to the bottom of that.
When it comes to dealing with the pain, there are different ways since Fibro is not the same for every person. There is physical therapy, exercise and other things. Meds can be a tremendous help. It sounds like you are trying to keep up with the way you exercised before which is a good thing. However, it is hard when you are exhausted and in pain. So don't beat yourself up and be to hard on yourself for not being able to do what you used to.
Keep searching for the right doc and try not to let those that do not know get to you when they say it is in your head. By now I am immune to it since I have had it for so long. Remember, fibro does not mean your life will never be the same. Everyone is different.
You have a great sense of humor.

This is a major plus in dealing with any illness.
Hang in there. Let us know how you are doing.
Peace and love, Hangin