I have got myself in a state in the past few months with test results I am trying to understand. I am just going round in circles,

I am 48 female and of average build.
I have cold urticaria, I react to the cold with hives and swelling, this started a year ago. I was sent to Guys & St Thomas's in London and they did some blood tests. Cold urticaria is rare but can show up in multiple myeloma, hence having these tests.
It showed that I have light chains lambda IgG paraproteinaemia (mid/slow band in gamma region).
My ANA is medium/positive and the pattern homogeneous, It has been like this for the past year and flagged it has been followed by an ENA but this was normal
ESR has gone from 12 to 23 and this has been flagged
My GFR is 72
Serum folate low at 4.0
I have protein in my urine and have today been referred to nephrology, but no Bence Jones. Creatinine 5.8 mmol and albumin found.
I have also got an appointment to see a haematologist next week.
I had a scan last week on my kidneys, liver, and spleen; all looked ok
I have pain in my legs, I am tired and low on energy. I have problems with my back and neck. A scan showed the joints in my neck are worn (done sometime ago).
My kidneys ache most of the time.
If anyone can throw any light on anything to help I would be really grateful. I don't know who to talk to, I don't want to worry my family or make a fuss, but it's a lonely place to be when you don't know whats going on.

My doctor hasn't explained anything. I saw him for a couple of minutes to ask him to repeat the first test that had protein in it, but he just passes on messages for me to attend scans and have more tests.
I hope someone can help