I had to take the shower squat down like 10 minutes diring and 30 afterwards. lightheadedness and extreme weakness like could not hold my body standing up?

These symptoms are very understandable & expected after squatting that long. Decrease in blood return to the heart caused a drop in blood pressure with a decrease in circulation to the brain. Your symptoms should resolve as blood pressure and circulation normalize. Lying supine for a while should help. If you're not feeling well following a rest period, see your physician for evaluation and advice