Hello Figgyroll - I'm so sorry you are going through such an awful time at the moment, it must be so hard trying to come to terms with losing your dear mother, and the health problems as well 
It is very very natural to worry about every niggle, we have all done that - but try hard not to poke and prod around, as that will make you sore, also you can get very achy and have pains in different places from anxiety, tension and stress.
It is good they are getting all the tests done quickly - the less waiting you have to do the better, it sounds as if you have a good hospital. Don't panic about the scans and tests, they are regularly done, just to check everything.
Once you get your results they will tell you what they think is the best course of treatment, and once you know that, the panic, shock and uncertainty may well calm down a bit.
Is there anything specific you would like to know that we might be able to help with? - just ask - nothing is off limits.
Don't be afraid to ask your GP/consultant about help with anxiety, sleeplessness, and there is usually counselling available for cancer patients.
Hope we can help you with some hand holding and support 