If you were my sister Id say... lets check back into depression.
Depression intensifies pain and can cause you to be preoccupied (anxious). Anxiety can cause a lot of strange symptoms -nah, let me say it like this- when depression and anxiety are controlled, various ailments tend to improve.
In no way am I saying youre not feeling all these things. Im just saying it sounds like a possibility that..... during your last pregnancy you encountered depression, things slowly fell apart, you began to feel bad, you super-tuned to your body (since messages were being sent that somethings awry), and you've been going in circles ever since. The ailments continued to compound, you continued to feel swallowed whole. And you HURT. Everything is too much. Nothing is normal. Somethings wrong. I hate feeling this way and I need my body to get better. ???
All of these things are symptomatic of depression.
Since you mentioned white blood cell components (eosinophils) I figure youve had labwork. Seeing so many Drs I also figure they checked and really didnt find anythign that stood out. If this is true, maybe you could just try to treat the depression again. You mentioned gaining 70 lbs and that can happen with certain medicines. There are many, you could try another.
Im just really sad to hear youre so miserable and depression is a possibility. Im nobody that can say its not something else, but while your trying to get another Dr to help you find out, you could see a dr to try new meds for depression and hope things get better.
No matter your choice I hope you find yourself better soon.