Side effects of Singulair - how long does it take to be rid of them

After reading all the posts, I am somewhat comforted that I am not losing my mind and rather it is likely the Singulair. I only took it for 2 weeks (and it worked like a miracle!) before I started feeling depressed, panic attacks, tightness in chest, etc... I took it for a further week before realizing it might be the problem and stopping it. I have now been off it for 3 days and already notice a huge difference, but am wondering how long it has taken everyone to be completely rid of the side effects? I figure it will take more than 3 days, but hopefully since I was not on it for very long, it won't have done much lasting damage. Also, did anyone else get a feeling of their throat being constricted or having mucous build up that is difficult to swallow? That right now is the most uncomfortable feeling -especially at night. Thank you for your feedback!