Blaming situation, please comment

My son is in treatment for Lyme and has gotten better, but every 3 weeks feels horrible again. Today he called me to visit him(I am feeling bad and could not)and in our conversation came out: that he can not understand why, when he was first sick at the end of 2017 with a rash on his scalp, I did not immediately look for a way to send his blood to Igenex. I know in January they did Lyme through one of the 2 big labs in the country and came negative.
He is an attorney and it was like a deposition, every explanation why I wanted him because of his symptoms (very different than mine) to see specialists, as he did, was not enough for him and he said he could not forgive me for that... Long story short, he has a lot of resentment towards me and I had to hang up, because he was stressing me for his blaming that he could have started early his treatment. I explained that I did my best in the circumstances and that was not enough. Now I understand why lately he has been different with me, last time I saw him, he got mad for something and told me the same, that day I told him I did my best and left. My question to you is what can I do or say, for him to understand that even that I knew about Lyme because I had it and have Dr H book, at the beginning I never thought it was Lyme. His first symptom was shortness of breath
None of my reasoning was enough for him.
What was important is that I told him what I learned through the guru Ch.., that for him to be emotionally free, he has first to forgive me and then to work on freeing the emotion.
Thanks for any comments,

I agree with Sara - he’s an adult - shouldn’t be blaming you - sorry that he did that !!

I hope he realizes this and owns it - and apologizes for his behaviour.

Bluelyme - For a long time I imagine similar scenarios to what you describe, running into doctors who dismissed me early on and could have saved me (and my family) these years of struggle and pain. You're right that it's natural to feel angry and want someone to blame. I keep a few letters I drafted to those doctors, and I plan to send them once I am feeling better, so that not only can I encourage them to correct their own ignorance about these illnesses, I also can tell them how to help others. It might feel really good to lash out, but ultimately at least part of me knows we'd all be better off if my communication came from a place of education rather than anger. Thanks for being open about your experience. I think a lot of us feel that way!

i had found a link on the wayback machine but that was 2 fones ago ... i may have posted link a few times it was deleted from lymenetflash