Hello and Welcome to our WHL family.
I am glad that you found us and that you decided to join us. The short answer to your question is:
It is very common for auto-immune disorders to overlap. Almost all of us here suffer from more than one auto immune disease; many with LUPUS being the first to appear and the others to develop afterwards. However, it is not uncommon for others to appear and then for Lupus to develop. Once we are afflicted with one auto immune disorder, we are prone to developing others. So, yes, your overlapping issues are quite common.
It is important, now that you are said to have mild Lupus, that you make the appropriate lifestyle changes needed in order to help prevent your Lupus from escalating. Mild Lupus generally means that your internal organs are not yet involved, that you may not have to take a lot of medications to manage your Lupus and that you have no life-threatening issues immediately at hand due to Lupus. So, please take any and all medications prescribed, follow the regimen suggested for appropriate lifestyle changes to protect yourself and to manage your Lupus. These can be found in the "Sticky's" at the top of each forum.
If you have any questions at all, please know that we are here to help you as much as we can.
Peace and Blessings
Look For The Good and Praise It!