Plant diagnosis

She was doing great! Fastest growing and tallest of all. But now she is struggling.... Was thinking maybe cause I haven't watered in about 3-4 days, what do you think?

needs water. after you do, it'll be standing up in fifteen minutes.

Definitely needs water. Some people wait till the see they're plants begin to droop before watering. I say after you water lift your container to get a feel for the weight, then check the weight regularly to see if it needs water or not. still heavy is good but once it gets a lot lighter then water.