We have done alot of trial and error in this house so don't feel too bad. We found that we also can't do every other day with the Singulair. It just isn't enough coverage.
I don't call the Dr until she is in the beginning of the Red zone. If she is fully in Red, I don't call at all

We have a rule that we will only go to Xopenex every 2 hours. If it goes beyond that, I take her in.
I hope your little one gets to feeling better soon