I am a healthy woman and love doing sports. My allergies started ...

I am a healthy woman and love doing sports. My allergies started slowly since I moved from my country Chile to U.S.A . At first it was a mild congestion, second year congestion and conjunctivitis, third year the same plus sore throat. This year almost asthma symptoms. It was right after running a 4 mile race through Central Park here in NYC. My coughing started very dry and by the third day I was coughing phlegm and I worried because I thought I was having bronchitis or something along those lines. Besides I have a 4 months old healthy baby girl. So I went to the doctor and she prescribed singulair once a day and asmanex two hours before starting to do exercises. Immediately after taking singulair my itchy and watery eyes stopped and the first day was great. I am on the third day and I am so tired and achy almost as if I am ready to have flu. My stuffy nose is permanent now and at night I am anyway coughing but a dry cough. Because I take the medicine at night I wake up nauseous and with a light headache and also feels like if I have sinusitis. These may be mild side effects but it was recommended by the doctor to ease all these symptoms and I feel completely opposite...All these side effects are listed on singulair but I wonder if a medicine is listing more side effects than benefits...Why anyway goes to the market? I do not like taking medicine and I did took singulair for my daughter to protect her and our family as prescribed by the doctor. I could notice the negative difference right away since I haven't taken any kind of medicine since I got pregnant and even before. Maybe is too early to tell but I know my body and I can tell this medicine is not right for me. I have decided to follow up the treatment for 10 days to see if I notice some other improvements but so far it seems that I am taking medicine to get sick instead.