Nausea & Imbalance

The day before yesterday was slightly perturbing; I had nausea & imbalance throughout the day, yesterday the nausea had gone but I still had trouble walking straight, today it's cleared up. I was wondering whether it was anxiety from the stress of being out of work for 26 months, struggling through and it's catching up with me; or it's from sitting in front of the computer screen categorizing my photos 17 hours a day, it's unwise to fix one's gaze on a screen to closely over a long period of time, most probably that, plus a bit of anxiety over my wanting to display my photos straight away, only instead of taking minutes it was taking hours due to my laptop breaking down; or it was my diabetes raising its ugly head because of my sedentary pastime; whatever it was its gone now.