Miralax won't be making the stools hard.Fruit juice and soup with veggies do not tend to have much fiber in them, maybe it isn't enough for you. Maybe add something with soluble fiber in it with lunch and dinner? It may be worth adding up the fiber you do eat and see if that is the range you should need.If this was working for you before I would just try to ride it out. IBS can get better and worse even if you eat the exact same things. Diet alone never is the entire story.You might try adding the stool softener, but it works pretty much the same way as the miralax.