Those purple spots are familiar to me. I get them on my arms, hands, trunk and thighs. Sometimes one or two will get really large and become flaky.
These were one of the first things that got my PCP back in Texas concerned back in 2007. They went away completely while I was on Methotrexate, but now they are back.
MTX can be hard on the liver, so I doubt whether your doc will want to try it on you.
Each of us is different, and our docs have to experiment until they find the right meds and dosages for us.
Keep a good list of the symptoms that you notice - perhaps even take some pictures of the spots and rashes - and be ready to discuss when you see the rheumy.