I have been on singulair for a few years due to sinus infections,...

I have been on singulair for a few years due to sinus infections, and allergies. I am going to have to check dates, but during my treatment with singulair I became severely depressed and needed to go on an antidepressant. I have terrible headaches when i wake up also. I was just tested for celiac disease because i have so many symptoms that match the disease , or is it medication side effects? Personally i thought it helped the allergies, but who needs the other side effects? i would not keep my child on it, i am going off of it... and on top of all of that it is expensive!!!