Abdominal discomfort, giddiness and unsteady walk

[Peterthegreatworrier]

Hi. For the last few days, I have been feeling quite tied and unmotivated. This morning, I started getting achy joints, and started to get the abdominal and gastric discomfort I usually associate with diarrhoea. Just when I was walking down the stairs, I noticed that my legs seemed a little unsteady. Now I'm worried that these could be symptoms of a serious infection, such as menigicoccal disease. I don't want to waste time worrying about this - I guess I need some reassurance.
Regards, Peterthegreatworrier.