I am 35 yr old female and have been on Singulair for at least 3 y...

I am 35 yr old female and have been on Singulair for at least 3 years, maybe 4. I stopped taking it 3 weeks ago and I am feeling better than I have in ages. I had no idea there were so many side effects until I started reading the posts here. I had read on packaging inserts about the higher incidents of Singulair causing ear and respiratory infections. I have had numerous infections in the time I have been on this med. I have also had problems with nightmares, teethgrinding, tension in the jaw area and severe headaches. Now I read that others taking Singulair are experiencing the same! The nightmares are terrifying and vivid, something that had not troubled me before. I recently found out I have elevated liver enzymes which the dr cannot figure out why. I now suspect it might be the Singulair or even the combination of taking it with Zyrtec. I really wish I could get off Zyrtec, but I sneeze non-stop and itch like crazy the three times I have tried to stop. Help!