Hey MadameKK, and welcome to the whl forum. Discoid can indeed stay just discoid. Someone will know the stats, but if that's what you do have, there's just a percentage of folks with it that do go on into sle. Just don't ignore other symptoms if they pop up. You know now to avoid the sun. Meds *can* make you sun-sensitive, but don't quit the meds and expect to *not* still be sun-sensitive. When all this stuff started hitting me, while it wasn't overnight, it was a rather rapid change. It can be a "shock to the system", so to speak. I went from having no issues in the sun (I worked outdoors at the time), to being so sensitive, that I'll burn easy, just driving in the car from work, if I'm not careful, and then I'll break-out.
"There but for the grace of God, go I."
"... His mercy endureth for ever."