Golly gosh, this thread has totally grown in drama and hugeness! FWIW, there are quite a lot of sites where it's actually against the rules to ask for and give medical advice, because of the very reasons Red Frag has mentioned! Like, no one is being mean here - there are just a lot of dangers inherent in doing so. Most sites I'm on, there would totally be a mod in here straight away stating firmly that no one can give medical advice.
Having said that, I don't see anything wrong with lightheartedly posting minor things, like a bruise or a wart or a swollen finger or a hangover or something, and asking if anyone has had similar - like, in the privacy of one's own diary, and with the understanding and maturity to know that no one can really diagnose you! But gosh, things like dizziness and migraines and blurred vision can actually be potentially really serious - they are the symptoms of all kinds of serious conditions (from a stroke to a brain tumour!) as well as non-serious ones! On most sites, this thread would totally have been stopped sharpish by a mod! Simply for the health and safety of all concerned.