Sorry, there was a problem with my internet connection & I am late to answer your follow up query.
I understand the anxiety & stress, you are passing through.
It is good that CT scan was clear.
The raised liver function test result can occur from medicine & will likely to come back to normal.
Physiotherapy is good for musculoskeletal problem. Please continue it.
Please add fresh fruits too.
I feel doctor did not find any abnormality or swelling in the neck area.
It is too early to say that it is from tumor. But a thorough examination is needed.
If you take alcohol, I would advise to avoid it. Alcohol & stress can worsen hot flush & alcohol can worsen liver function.
The weakness and lack of energy may be due to low hemoglobin too.
Dehydration, electrolyte changes are common causes for muscle cramps & pain.
Please take plenty of fluid to keep hydrated. As I wrote before, please take fresh fruits, vegetables which are rich is vitamins & minerals.