New to Psoriasis

I'm Alison and 59 yrs old . I developed it in my scalp about a year ago, after working in a very stressful job. I also about 2 years ago developed Lichen Planus. Previous to this, I've never suffered any skin issues or allergies. I don't know if there is any connection? My scalp drives me crazy with the itching and spots/ patches all over, My scalp flakes skin all the times, it's like a carpet of skin cells waiting to fall off and I'm getting scared to wear anything but light clothing. I use Carpasal and skin creams on the body, but all others steroid based ones are very strong and greasy i e Dovobet, no good for my hair. I have not even been told which type of psoriasis I have. I went to Gp recently as I'm concerned it is the one related to arthritis. I have been told I have arthritis in my arms, hands. Recently (6months) I have got a lot of pain in my left foot which swells up over the front and got plantar fascilitis., my heel really hurts and one middle finger swells up and is very painful and can't close my hand properly. I seem to suffer the most in the early hours and on rising. I'm finding it very difficult to open things and putting my feet to the floor and walking is difficult early a.m. The gp was very vague about the results and told me to take buprofen, I just felt insulted as if making a fuss about nothing Any suggestions gratefully received.