Quick question

I have about 10 plants that I started inside in pots and a few in plastic cups. This morning I watered them just a little and they were fine. This afternoon I checked on them and 2 were leaning over. The stem is not broken, but they are bent over. What caused this? They were getting good sun today through the windows. They've never been outside, by the way. They arent exactly centered in the middle of the pots either, because I kept the best ones in each cup or pot. Does that have anything to do with them falling over? Or was it the water? Should I toss them and start over, or will they make it? PLEASE HELP! pics coming soon

id hang on to them for a while and see how they do. they might just be soakin up the water you gave them and its making them a little heavier.