Singulair and cold weather

I have been on Singulair for just over a year now and I never thought I had any side effects from it until my fiance told me I shouldn't stay on a tablet for too long and to check on the net for the dangers, so I found this site. I said I have not had any side effects but having read a number of side effects experience from other people I can now recall within the last year telling my fiance:
1) Lately I feel like I am nearly going to have a panic attack, only sometimes and I don't know what brings on this thought.
2) Sometimes I stop eating something because I get this sudden thought in my head that I am allergic to it and my throat will swell up, and I start convincing myself my throat is swelling a little bit, and then I feel like I am going to have a panic attack
3) I experience the itchy hands every few months, and itchy eyes
4) Two weeks ago I took two days off work because I was so lethargic and so unmotivated, went to the doctor and he could not explain why I felt like that. The same week I was feeling very depressed.
5) I had a huge row a few months back with my fiance and for the first time in my life the thought came into my head about what it would be like to commit suicide, I wouldn't do it, but the fact I was curious is scary
6) I have strange dreams all the time, and now I recall that when I started singularity I knew this was a side effect and accepted it
7) Here is a new one, not sure if anyone else has noticed this, but in the last year I have suddenly become allergic to things I was never allergic to before. Or perhaps I always was with no symptoms but suddenly I have symptoms which involve swelling of the eyelids and red patches on my face, caused by cherries, or a rice I bought in marks and spenders. Never had allergies like this before and these two arose in the last two years. Also every time I take a shower I have a temporary red rash on my legs afterwards, doesn't matter what shower gel I use, its like I have an allergy to hot water.
8) And finally, has anyone else suddenly developed psoriasis, I developed it just 6 months ago, couldnt link it to anything but now I am writing all this down it comes to mind maybe its the Singulair two.

I cannot believe 10 minutes ago I just told my fiance I can take this tablet forever, its completely natural.