Bad? Well, first let me ask this. Did you start from seed or clone? I'm guessing seed. And if it IS from seed, you would almost certainly get a real crappy plant if you left it on 12/12. If the plant is actually growing, then it should be able to handle the switch back over. It might slow down in growth a few days, then start to grow one-finger leaves like it was just starting out, but that would mean that it is going back into the vegetative state. It should be fine. Then, you can grow it up to 1.5 to 2 feet tall and then swtich it back to 12/12 and it will start to flower. That's the 2nd best thing you can do right now. The BEST thing you could do right now, honestly, is start over the right way. BUT, I do not condone throwing away plants, so I'd at least try to save the one you've got and still start another one or two. You will be amazed the way the new ones will catch up.

Hell, you can even put it on 24/0 if you want. The more light the better right now.

TGF