As you were in a car accident, there is also a strong possibility that you sustained a TBI (aka concussion). Some of your symptoms are consistent with brain injury. You might want to have a neuro-psych exam to check it out. If you're litigating your accident, your lawyer will almost certainly suggest that.

If you were a UAW member during your automotive career, you might want to talk to your union's health and safety officer about your lead poisoning concerns. If there are others cases, like yours, he/she will know.

All the best.