Sorry about your diagnosis and
at the disintere4st of the GP and rheumatologist.
I've just (Monday) been diagnosed with mixed connective tissue disorder which is an overlap condition with symptoms of several auto-immune diseases including lupus, scleroderma and myositis, and possibly a few others; it's also certain that I have sjogrens syndrome as well.
from my limited understanding of it all, a broad brush "oh it's just a mild case" is a bit narrow minded as it is a ddisease that is ever changing, and just because you are in a period of low disease activity, doesn't mean it won't flare up next week or even tomorrow and that you should be being monitored regularly to make sure things are under control. If you're still symptomatic, then you perhpas need meds to control things. Are you taking anything? steroinds, anti-inflammatories etc?
A recent blood test I had flagged up a possible connective tissue disorder, and within a month I was at the local rheumatology clinic, where they gave me a very thorough check up with x-rays and took more blood to determine just which antibodies are involved. they also gave me a steroid injection which is already making a huge difference to the background joint and muscle pains I've had for several years. Have you had any further tests done other than blood tests? I've had a month to get my head round the possibility of lupus/MCTD etc and have read up loads and am still very confused by it all.
I second making a longer appointment with your GP to discuss things, but bear in mind that your GP may not be all that clued up about it. find out if there is a good rheumy clinic at any of the hospitals close to you and push for a referral. The lupus uk] may be able to help out and the message boards on www.thelupussite.com are very helpful and supportive. It's mostly N American, but there are Brits on there who may be able to help out.
I'm in a state of flux at the minute and reeling with all the information I've been given and feel that I have had a good experience with docs etc, so can only imagine how confused you must feel 