Young adulthood symptoms and conditions

Along with uncharacteristic depression from using singulair for only a few months- I experienced ( and still now, after 1 week prior to ending my daily dosage) terrible lower calf cramps I have never experienced before. Not only do I get quick searing pains in my legs at night, but my calf muscles are very sore whenever participating in brisk physically activity. I hope these side effects will terminate shortly- because for an athletic thirteen year old high school freshman, depression, lack of energy and physical pains are not making the beginning of young adulthood a very enjoyable experience