Diagnosed with carpel tunnel and tendonitis. last 6 months, pain in left elbow, increased weakness and waking at night with pain and numbing. normal?

The factors that: contribute to carpal tunnel syndrome--repetitive manual tasks (keyboarding, etc) can contribute to compression or entrapment of the ulnar nerve at the elbow resulting in "cubital tunnel syndrome." This elbow pain is typically on the inside/medial. Overuse can also cause lateral (on the outside elbow) epicondylitis/tennis elbow. Your Hand Specialist can help sort this out. Stay well:)

Worsening: Carpal Tunnel disease gets worse with time if you do not take care of the joint and what you have described might be signs of worsening disease that might need further measures like injections or medicine or even surgery.

Get reassessed : Need to examine to establish whether the issue is worsening tendinitis worsening carpal tunnel or another condition such as radiculopathy (pinched nerve). A GP examination would be a wise place to start then depending on what's found determine tests to sort out diagnosis + treatment options

Not normal: It sounds like your symptoms are getting worse and it would be wise to get reassessed to try to address this. For the carpal tunnel, are you wearing a splint at night? - you can usually buy them from a chemist. This simple intervention can often improve symptoms from carpal tunnel by preventing your wrist from flexing during sleep which helps to offload the pressure on the nerve.

Re-evaluation: You should get this checked again. It is possible that you also have cubital tunnel syndrome which is a pinching of the ulnar nerve at the elbow. This can generate some elbow pain with some numbness going into the forearm and the small/ring finger. It is also possible that your carpal tunnel has worsened.