I just started taking Singulair. I took it Wednesday evening wit...

I just started taking Singulair. I took it Wednesday evening with no problem. I took it Thursday evening and woke up in the middle of the night with vertigo. This lasted for a few hours. It was horrible. I called my allergist and he said this was not a typical reaction and to take it again tonight. No Way! On the Singulair website they said extreme dizziness is a rare allergic reaction. Has anyone else has dizziness or vertigo with Singulair?