In your opening line you said you watered it. If your a newb (not a bad thing) were just saying more than likely you overwatered. With smaller clones and seeds all they really need is a light water. You can even use a spray bottle and mist the soil. Listen to green cross he knows his stuff. Heat and too much water tortured your plant. If thats the only one you got it may be able to be saved but will take awhile to recover. If you have the option to get another healthy one, then dump it and get a healthy one