I've had this issue for as long as I could remember. If I stand up too quickly, sometimes my sight will go black and I'll feel dizzy for a few seconds. Crouching has always been problematic. I guess I'm restricting blood flow while my knees are bent like that and when I stand, it all starts rushing and I feel light-headed. In the past I have passed out a few times, which had as much to do with low blood sugar as low blood pressure. Yesterday, I was crouching down a lot (for my job) and kept experiencing this dizziness, and my heart was beating really hard/fast at times and I felt hot. I ate some coconut flakes and plantain chips, the only snack I had with me, and felt slightly better.

I'm thinking I was low on salt yesterday? I remembered to salt my food today, assuming that is the cause, but I wanted to find out if this is at all normal or if there is something I'm overlooking. 3 weeks in to this paleo diet, I still don't feel as awesome as I expect I should. My arms, particularly the left one, feels weak a lot of the time. I'm taking a potassium/magnesium supplement because I read it might help, but it hasn't. My diet isn't perfect yet, but I'm working on fine-tuning it. I just want to make sure I'm not hugely deficient in something or doing myself any harm. Does any of this sound familiar? Any advice?

BTW I do plan on seeing a doctor soon for bloodwork and a general checkup.