Allah does not hurt except to heal
مَا أَنْزَلَ اللَّهُ دَاءً إِلَّا أَنْزَلَ لَهُ شِفَاءً
Ma anzala-llahu da'an illa anzala lahu shifa'.
"Allah has not sent down a disease without sending down a cure for it."
Narrated by Abu Hurayrah. Sahih al-Bukhari 5678
A short reflection
Permission to see a doctor, try a second opinion, keep looking. The cure exists, finding it is work you're allowed to do.