IreneO,
Stoic philosophy is the only one thing that has given me any worthwhile help. Just like the author in the above post wrote. Have you read the Enchiridion? You must. It's a very short and easy to read manual, I have it in multiple language and formats (audiobooks, ebooks).
Seneca is great too. Check out 'The brevity of life'. He wrote a lot, about all the things that people fear the most.
You know, I -hated- the idea of philosophy. Because it's generally presented as verbose tomes read by academics. In my opinion, these are NOT philosophers. Philosophy isn't for studying at college, is for living in life.
The trick is to find material by Epictetus, Marcus Aurelius, Seneca (three of the major Stoicists), that is material -as easy- as possible to read, absorb, and digest. Audiobooks are a great solution, as you don't need to be strapped to a book to learn lots of great stuff.
There are innumerable editions of any of these master's works, and I often find that I detest one edition of a work, and I love a different edition of another work. Just because it's presented by a different personality.
In a sense, I have been lucky as I have found 3 or 4 truly powerful audiobooks versions of Seneca's works, but they are not in English.
I must say that after checking many audiobooks versions in English, I only found one that I truly, truly like, which is this version of the Enchiridion (highly recommended, and in the public domain):
I usually prefer to buy my audiobooks, as they are usually spoken by professional speakers, however the free one above, in my opinion, is excellent. You can download the audiobook for free here
https://librivox.org/the-enchiridion-by-epictetus-tr-elizabeth-carter/
I listen to this every night as I fall asleep.
I read and learn a little everyday, so that by the time I will have to face ill luck, illness, or death, my mind will have been fortified, and I will not be afraid of these things.
Which, as Epictetus said, are not bad, (or good) things. They are just things that happen, and can happen to anybody.
This last point was very difficult for me to truly understand, but once I did, I never looked back.
Another great source, is the samurai Musashi. This is a great quote of his:
''Accept everything that happens in your life. Everything. The way it is. Never regret anything in your life. ''.
Not sure why, but this has been extremely powerful for me.
All the above did 30 times more for me than any doctors, audiologists, psychologists, etc etc.
Although I learned to accept those too. Really, no one is to blame for my misfortune. I don't even expect anymore that people understand how I feel or whatever.
And I am thankful for the few good , but truly special, things that happened in my life in the past. They are no longer there, but I am still thankful for them. I know for certain that some other people haven't been as lucky, which saddens me.
Keep strengthening your mind. As these philosophers taught, this is the only one thing we truly have any control over