Yeah nytros, Clix is on the money. I gotta believe your ph meter is jacked bro. Normally with twisting like that you are looking at ph or over feeding issues. Since it appears you haven't fed anything and I don't know anything about the megaworm but I just did a search and it looks like that is perfectly fine for seedlings then feed shouldn't be a problem. Considering what you said earlier about your ph meter I would be willing to bet it is jacked. Normally with heat issues you won't see a twisting like that, they will curl upwards. As young as that one is, I would be tempted to hit it with some aerated tap water. IF your tap water is pretty decent. If not, go buy yourself a liter or two of spring water, which should be a perfect 7.0 and water her with that. You want to be ~ 6.8 but 7.0 is pretty damn close and considering we don't know if your meter is working properly the 7.0 will get you into a safe range.
Next, if your meter is capable of being calibrated. Do it. If not, I would suggest getting yourself another meter pretty quick. You are going to need it yesterday.
Hope that helps bro.