It sounds a lot like Crps. But I'm not a doctor. There are a lot of conditions that share MANY symptoms with Crps. However I will say that Crps and a lot of Neurological conditions can all be effected by stress. It's extremely hard to say stay calm when you're having all these freaky symptoms on top of a ton of pain, trust me, I know personally. But it is true. Until you can see your doctor and get some definitive answers or a diagnosis, try some meditation or yoga breathing.
I sincerely hope that you don't have Crps as it's not fun!
In the meantime I'm sending Love and Warm hugs!
Emma