Had a health scare myself a couple of weeks ago. I suddenly lost partial sight in my left eye, so made an appointment with my optician. She carried out the standard tests with her instruments, but couldn't find anything wrong. Clearly there was something wrong, so she sent me to the eye hospital, with a request for an emergency appointment. The eye doctor carried out a thorough examination of my eyes, and then told me "there is good news and bad news". The bad news is that you have a blood clot behind your left eye. The good news is that it is
behind your eye and not in your brain, otherwise you would have had a stroke.
He then sent me over to A&E (Accident and Emergency), where they tested me every-which-way - blood tests, blood pressure, ECG on my heart, MRI brain scan (to check there was no bleeding in the brain), and finally a scan on my neck to check that there were no blockages in the arteries feeding my brain/head. They kept me in hospital overnight, and wired me up to an automatic monitor which checked my blood pressure every hour throughout the night, even when I was asleep, and gave a read-out in the morning.
Happily, they couldn't find anything wrong with me apart from the blood clot, so sent me home rejoicing with some blood-thinning tablets. I have a follow-up appointment at the hospital tomorrow.
However, I have instituted some lifestyle changes. Because I have vegetarian tastes and do not eat meat, I tend to over-compensate on cheese - cheese sandwiches, toasted cheese, pizza etc. Too much cheese (not to mentions chocolate!), and too little exercise, I guess. So, I have cut out cheese and chocolate completely for the time being, and am trying to major on fruit and fresh vegetables, as well as taking more exercise.
I'll keep you posted on progress.