Thumb twitching...driving me crazy..its been 7 months now!

My left thumb started twitching 7 months ago and has not stooped since.  It's driving me crazy!  It's so hard to sleep and I always try to cover my hand thinking someone will notice.  I have pain in my muscles and have lost muscle strength in my hands and arms.  I can't open jars anymore and have pain from simple tasks.  Does anyone else have the thumb twitching problem?  Its not nerves and never goes away.  Has anyone found any answers?  I can share my Neuro doctor visits and testing with anyone has has similar issues, maybe we can compare notes???? Looking for advice from anyone. Thank you

[OSY]

I experience thumb shakes when I hold a some what sharp and small object between my thumb and then my index finger. I have had this condition for as long as I can remember probably 6 years now, what can this be, and is there a chance of it deteriorating? Please help out