Those red dots looks alot like a Calcium def., in fact, I'm fairly sure that's what it is. Are you using distilled or RO water and/or did you not add lime to your potting mix? I had a calcium def. a couple of months ago, and it looked alot like yours (before getting way worse, so worse there was no question what it was, and when I gave it Ca, it got better, so I know that was it).
Let me quote Calcium def. symptoms from "Marijuana Garden Saver (an Ed Rosenthal publication)" : Calcium def. stunts plant growth and makes the leaves dark green. Large necrotic blotches of tan (red), dried tissue appear on new growth but also on other plant parts along leaf edges. Young shoots crinkle and get a yellow or purple color. In severe cases they twist before they die. Necrosis appears along the lateral leaf margins. Problems migrate to older growth, which browns and dies.
Alright, so I'm 97 percent sure thats what your problem is. I would watch your plant to see if its stable or getting worse, and if its getting worse, get some lime into that soil asap. Beleive me, you do not want to see a Ca def. gone bad, basically stops the uptake of P and K, mostly K, and things just get nasty from there.