Singulair and birth control pills

I have only been taking singulair for about a month. I have noticed that I have become more irritable, grouchy, hateful and just numb, not really wanting to be around anyone, not caring about anyone else's feelings much. I also noticed I have become extremely lethargic, to the point of falling asleep at work as well as heart palpitations and stomach pains. I just started new birth control pills so at first assumed they were causing these side effects, that is until I looked up the side effects of this drug! I have over half of the side effects so I stopped it immediately and can already tell a difference in my mood. I have to sons age 11 and 14, both who have asthma and allergies. The took this medication for a few years with no side effects but have not taken it for about a year now. My youngest son however, has been diagnosed with ADHA and ODD and possibly BiPolar disorder. As I read the other posts, I realize the description of how their children act while on this drug is exactly how my son acts. I wonder if there can be irreversible permanent damage from taking this medicine? He has been on a number of ADHD drugs, none have helped except to make him stop eating and lose weight and he is small for his age, so I have taken him off everything. Has anyone else out there experienced what could be permanent damage from this drug in their children? Even after being off the drug for a year or so? If it could make me miserable within a month, what can it do when one takes it for years? Its sometimes hard to tell the effects of medicine on small children. My son prob starting taking it around 4 yrs old and took it til he was about 8 or 9. Just wondering if anyone else out there has had this happen to them or their children.

Okay- A friend just emailed this site to me, my son is 4 and has been taking Singulair for about 2 years. He has seasonal allergies which seem to be year round, asthma and food allergies. He is on Singulair and Allegra daily, this in it self freaks me out. What I have noticed for at least the past year is that when he is running around or moving a lot he hold his right side and says he has a pain in it, we now call it a "stitch". it happens not from strenuous activity, our doctor just says its growing pains, that doesn't make sense. something is bothering him it happens with somewhat frequency. I am really thinking about his behavior, it seems to me he can change on a dime. from happy to very angry, outbursts and then right back to sweet, yes this could describe any 4 year old, but not any 4 year old is on Singulair. I remember saying to him where is my sweet boy? I feel like that might have been when we started the meds, i am so used to his behavior now that it seems almost normal but there was a time he acted differently. and i do remember saying that.... was it when he went on Singulair???