my son is almost 4 and has been taking singulair since right befo...

my son is almost 4 and has been taking singulair since right before he turned 2! I am just blown away by all these things i've heard and now read about this med. I NEVER would have thought about this making him act the way he does! I thought it was just his terrible 2's and 3's! He has major anger issues, he screams out of nowhere for no apparent reason, when he gets in trouble he hits me or makes these horrible faces! he scares me sometimes! he has trouble falling asleep but once he is asleep he is out for like 11 hours sometimes! Here in the past yr when he plays with other kids he is very very mean to them... hitting them, beating them up, yelling at them.. i've NEVER seen my son act like that! It really sucks when other people just don't even wanna be around anymore b/c your kid is so mean! Which he has never been a mean kid! everyone loves him to death but can't understand why is so mean and has these outbursts sometimes! B/C that just isn't my Brayden!! sometimes i just think he is flat out crazy... like maybe i need to get him tested for some kinds of disorders! i just don't know what to do! the doc will tell me its normal 3 yr old behavior I'm afraid... and now if i take him he will think i am some crazy mother who is hearing all these stories and believing everything! Well hell ya I'm reading all this and believing everything cuz I'm sitting here experiencing the exact same thing other moms are who's children are on the same medications! I've even thought maybe its me i just had a baby 3 months ago so maybe its postpartum... so went to the doc and she has me on Zoloft which i DON'T need... I'm not a depressed person at all! But i have days where i just don't know what to do with my 3yr old i just cry i cant handle it it is entirely to much for me! it just blows me away to think that it may all be caused by a med that I give my child every night to help him! But is it really doing more goood than bad? I don't even wanna know whats gonna happen next... what is he gonna do?! I don't wanna even think about the possibilities... To know i may have an answer to his anger and everything else is kinda relieving, yet this whole thing scares me!! The med has seemed to help his breathing problem since hes been on it though! But if it makes him angry I'm sure the zyrtec and breathing treatments will do just fine!!