Drooping, Please Help!

So when I went to go check on my Chemdog today I noticed that my leaves were drooping and two leaves towards the bottom are drooped down and look dead. I just started feeding them bloom nutes. No sign of nute burn yet. Could that be nute burn? I have 2 other plants with her and she is the only one drooping. Just got watered today so I know shes watered. So please help! I will try and have pictures by tomorrow if it hasnt gone away. But any help in the meantime would be greatly appreciated!

my guess is over watering

I water whenever the pot is light which is usually every 3-5 days, but I just read that some grow tents can kill plants and I have a grow tent, and Im not sure if it was made from pvc or not. Could that be the problem?