Almost every symptom you mentioned is a documented side effect of Singulair. Your doctor and parents may not be aware of these side effects so PLEASE TELL YOUR PARENTS how you are feeling right away and show www.parentsforsafety.org, where they can get information about Singulair's side effects and the FDA's ongoing Safety Review of Singulair.
In January the FDA warned patients to watch for neuropsychiatric side effects (behavior/mental/mood changes) from Singulair. http://www.fda.gov/Cder/drug/early_comm/montelukast_200901.htm (refer to paragraph 5 that begins: "Post-marketing reports of neuropsychiatric events associated with montelukast...")
I am worried about you. Please post again with an update on how you are doing.
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