Welcome to the forum Adaline
I am sorry to hear your health is so poor and about the possible lupus. Skin lupus can have other lupus symptoms even when the ANA is negative, such as joint aches and pains. Your doctors should run a full lupus panel and do a urine test to see if there are any other signs of lupus. Antibodies called anti Ro are often found when there is no ANA. A full blood count can show up abnormalities such as anemia. It's a good idea to have thyroid tests done too.
It sounds as if you have already had some tests done but have you seen a rheumatologist yet? I suggest keeping out of the sun as much as possible and using sun block if you do have to be out in it. Protective clothing too if necessary.
The Raynaud's might be a sign of more widespread connective tissue disease but I know little about liver disease. I suppose that's being further investigated ? Lupus rarely affects the liver directly.
People with lupus skin problems are often started at once on an anti malarial ,Plaquenil, which will help with skin and joints and also help to get the lupus under control so hopefully it won't worsen. Your doctors might be wary of using it just yet because of the liver problems but ask them about it.
Please let us know how you get on - we'll help you as much as we can to get answers so don't hesitate to ask for further advice. Let's hope it won't be long before you are feeling much better
Bye for now

Clare