I was taking Singulair for about a month. It seemed to work grea...

I was taking Singulair for about a month. It seemed to work great. It relieved chest tightness and breathing related anxiety. HOWEVER, I got SEVERE muscle aches and pains that floated to different parts of my body, without warning rhyme or reason, from my head to my toes. The pain would last from a few seconds, to a few mins. and can return in the same spot, or appear somewhere totally different in a few seconds. I have been off of Singulair for about 2 weeks now. The pains have subsided from very severe (crying it hurt so bad) and now they are still there but achey rather than debilitating. Does anyone know how long this should last?