New here. Supporting my Brother

Hi everyone, 

I'm new here to these forums although not very new too coping with family members with cancer unfortunately. So I'll start at the beginning but try and not make this post too long. 

My older brother Chris who is now 49 years old, was first diagnosed with cancer in the Carotid Artery  in his neck in 2010 which was caught early and he had surgically removed with a course of radiotherapy after to kill any cells left behind. After frequent check ups he was given the all clear a while ago. He has had numbness on the left side of his neck where the cancer was after the surgery but no other complications from this which was good. 

In August 2017 we were given the devastating news that my mum (68years old) was diagnosed with Non-Hodgkin's Lymphoma Stage 4. After fighting like crazy and going through so many complications throughout the chemotherapy, T.I.A's, sepsis, causing chemo to be reduced each session meaning by her 5th session she was only getting a quarter of the treatment she needed and then refused the final session knowing by then that the chemo was not touching the cancer and it was already spreading rapidly. My mum lost her battle in March 2018, a very short 6 and half months after diagnoses. My mum was our rock. We have an older brother and a sister who is older than me but younger than my brothers. But my big brother Chris and I are really close to one another. 

A few months ago Chris (my brother) began having seizures regularly. One in which caused him to fall and have a bad bang to the head. A week later he began to suffer from double vision and was very imbalanced on his feet. Walking as though he was intoxicated which was impossible as my brother doesn't drink. So I took him to A&E again and this time I was there which him to make sure he had the scans. we were there from 10 in the morning to 9.30 at night (believe me when I say it was a mammoth task to keep him in the hospital that long to get the results. They performed a CT on the brain and chest and an x-ray. We were then told that unfortunately the CT scan had picked up tumours in his brain. We asked if there was a chance it could be cancerous and the dr informed us that he needed no test to know that it was cancer that had spread from another part of the body. Cancer of Unknown Primary. They gave him the option of staying in hospital and having more tests done while there the few days after but he was not staying so he is being treating in the outpatients ECAS unit. He has a CT of the chest, abdomen and pelvis and a MRI on Tuesday which I think will hopefully determine where the primary cancer source is and the MRI should tell us how many tumours we are dealing with as they know there are more than one. Which is terrifying giving that he has already started showing the symptoms of these. 

We are in Scotland and Im just wondering if anyone has been through this and if they can give a estimate of how long they waited for the CT and MRI results? I have read it could take up to 2 weeks, Im terrified that this is fast growing and time is of the essence here. Its horrendous at any time of year to wait for answers when it comes to cancer but this time of year it just feels like we cant function until we have the results. I mean I know how I am feeling in myself about this but I can't even begin to imagine how my brother is feeling and thinking. He struggles massively with his mental health so I am trying my very best to be there for him without suffocating him. But I just need him to be strong and try to fight through this as best he can. 

Wow. I am sorry this is so long. Its not something you can write in short sentences. 

I hope if anyone has had a similar diagnoses can, in the best way, give me some advice on how to cope the best we can while waiting and how to support my brother the best I can with any results we get. 

Thinking positive. As much as I can, without researching and jumping to conclusions. .