Hair loss and getting bald. Or not?

For the last 3 years, I'm facing a Serious Hair loss issue. Getting bald from many regions on my head and also my hair growth is very low now. Also, I have many patches on my beard and also now getting on new hair on my chest region, and also beard hair growth is very low. Early consulted with a few of the Doctors but my exact issue was not caught by them as they treated me as alopecia. However, now I have done a biopsy and it says that I have Discoid Lupus Erythematosus. I don't know as what to do, is it curable or not?? Seems to be unknown regarding this and also Its hard for me to get the correct and proper treatment as previously was under medication with good doctors but even after that taken wrong medicines for alopecia and now it shows as lupus. Kindly help me with something detailed to this issue and is it really curable or need to hair transplant as it is getting hard to wear cap all the times.