I Am Concerned I May Have An Autoimmune Disorder. I

I am concerned I may have an autoimmune disorder. I have alopecia areata which just started about two moths ago. I have never had that happen before. I had iritis recently as well and had never had that happen before either. Lastly, I have been experiencing lower back stiffness for about two months now, every morning and after sitting for a long time. It gets better if I move around or exercise. What could be wrong with me.