For The Last Few Months, I’ve Been Experiencing Numbness In

For the last few months, I’ve been experiencing numbness in my hands. My dr ruled out carpal tunnel and tested my blood for autoimmune disease. The tests were negative. The numbness has recently become painful, and it’s starting to spread to my forearms. It’s most prevalent when I’m lying in bed trying to sleep, or when I first wake up in the morning. The pain will also wake me up during the night. Do you have any ideas? Oh, and I’m also prediabetic, but my dr says that’s not it, either. Help, please!