I am a 91 year old lady who has having days of weakness this has just started 3 months ago so much so im too weak to leave my home I was very healthy before this I have had all the relevant blood tests and all are fine I am sick about 4 times a week but it's water not food coming up last July I had a very bad cough and cold. The cold has not gone and the cough comes back every so often for a day or so What do you think the problem could be I know my age might be a problem but this was so sudden as I could walk at least 5 miles a week no problem