right thumb is weak and unstable

I'm 16 year old, My dream is to be an artist, But i had a thumb problem that always restrict me from drawing. A flexible hand its really important for an artist.

My right hand thumb seems weak, instable. When i move my thumb up and down it create a weird sound on the wrist side part. I had done many researches but don't know what went wrong. Looked for doctor many times, and had a x-ray and the doctor said nothing happened to my thumb. if i write/draw too much the sound will became more obvious. When I place my hand on the floor with my paim facing the floor and wrist bended, applying strength to the floor. The side part of my wrist hurt quite alot. But there isn't any pain with my left hand.

I was very depressed because of my thumb. Don't know what's the problem with it. Sometimes i lied to myself that there isn't any probem with my hand since the doctor said so. i went to find chinese doctors, it mgiht help since i haven't tried it before. i had tried 3 chinese doctors, some said there is problem with my nerve and some said bone had went to other place. they failed to heal my hand but told me there really is problem with my hands.

My hand will become cold easily. chinese doctor said i need to eat more and given me some medicines. I think it might related to my thumb problem, maybe something block the blood flow.

I forget thing quite easily so not sure whether i sprain my thumb or had any injuries on my thumb/wrist last time. But i did some researches, it may be Scaphoid fracture. Since i'm not a doctor so i don't know is it true that its Scaphoid fracture. Sometimes even x-ray can't scan Scaphoid fracture. I only tried once. So please help i really need a flexible hand alot, Thank you.