Quite a story you have there. Congratulations on your former high earnings, your ability to save substantially on them and lack of debt, your recognition of the need for therapy and medication and getting them, your spouse coming around in attitude, your improved physical health, your meeting with a financial planner. You've made a lot of good choices in fraught circumstances this year.
As others have said, you are FIREd. Financially, work is optional and getting paid for it is optional. That leaves you with two issues: being happy in yourself with where you are, and dealing with your parents' negative reactions to where you are.
On the first, there are a number of people here with FIRE stories: feel free to check around and read up. Lots of us experienced the personal dislocation you are talking about, whether we chose FIRE or not, but the general pattern seems to be that after 6 months to a year we are settled into retirement (one exception is Exflyboy who is just now starting his third retirement, but we all have fun with that one, including him). I would suggest reading the blog of Dr Doom for excellent insights on the world of high paid work and his retirement from it a year ago -
https://livingafi.com/2016/04/01/early-retirement-bites/#more-8793As to your parents, they are displaying their own psychological problems in those daily phone calls. I suspect that the traits that enabled them to bring you up to be a high achieving and successful individual are showing themselves. I suspect too that you have never before rebelled against them, and if this is true then congratulations on having finally reached teenager status in their eyes.
I would try writing your parents a letter. Set out your story as you have put it here: you and your family are financially secure and never need to work again, that finishing work has been a shock to which you are currently adjusting so you are taking a year out to spend time with your family and work on your health, that you want them to be happy for you. Then say that their daily phone calls are not helping and that for the time being you will not be taking their calls except for an hour a week at a time of their choosing, and you will review that decision in [period of time]. Tell them thank you for all they have done and you love them.
Then spend your time healing, loving your family, and looking around at the world to see where your talents and new found freedom can take you.
Best of luck.