Haven't been feeling well for a few days, have had a sickness bug and haven't been able to keep much down.
Sitting on my laptop in bed watching YouTube just now and all of a sudden with no warning, my eyesight went totally black, my head was pounding, I felt warm all over and my arms were tingling. It went within 10 seconds or so but I genuinely was terrified for those 10 seconds.
Something to worry about or just related to being dehydrated etc?