Psoriasis...does this sound normal?

I've suffered from psoriasis for the last 5 years, at first used steroid creams doc gave but soon found that going to sunbeds worked better, was faster and less annoying! About 3 weeks ago I had a bout of nasty tonsillitis which I was given penicillan for, and a week after I had plaque psoriasis reappear on backs of my arms, face and legs as well as loads of little spots all over which turned into even more psoriasis (which I think is the pustular kind). Last week the doc gave me tar emollient stuff to put in the bath and also a tar lotion as I'm covered from head to toe. I don't know what, but something is making it worse (I suspect the tar stuff) my skin hurts all over, I'm lethargic, my legs have been swelling, burning, itching like there's no tomorrow. I tried to put moisturiser on last night instead of the tar stuff and I've never felt pain like it in my life-it really was worse than childbirth (I've had three so I can say this) I rinsed my legs off for half an hour in the shower to try and get it off to get rid of the pain and burning. Whats really worrying me is that since yesterday afternoon my fingers have been going numb and just after I put the moisturiser on my legs my hands and feet turned a blue/grey colour. Is this normal??? I've an appt at the docs again Friday but I'm really worried about this. Sorry its so long, and thanks in advance.