The beetroot and watermelon will turn my stool red and purple also. Not to worry.
I have been a mostly raw fooder for the past 2 yrs. I have to eat one serving of cooked meat or fish per day. I also eat a few baked potatoes each week. I start feeling very anxious when I don't eat any starch. I also feel very weak without the meat and fish.
The anxiety and sweating could also come from die-off. A mostly raw food diet is VERY cleansing.