Making a definitive diagnosis can be a lengthy process (sometimes taking up to a year). You are fortunate because your doctor does suspect some type of auto-immune disorder, which means that she should treat your symptoms while awaiting a diagnosis. Also, in auto-immune disorders, lab tests that are negative today may be positive in a month (and vice-versa). So, unfortunately, patience is pretty much the name of the game. But, as Mountaindreamer suggested, keep a record of your symptoms, when they occur, and when they worsen. Take this record with you to each doctor's appointment (and demand that they go over this list with you) and insist that your symptoms are treated. Even though there is no definite diagnosis.
Also, to help your boyfriend understand what you deal with on a daily basis, there is an article known as "The Spoon Theory". Many members have used this to explain to their symptoms and feelings to their loved ones. Here is the website: www.butyoudontlooksick.com
I hope that this will be helpful to both you and him. In the meantime, everyone here is understanding and wants to help you in any way that we can. Please continue to come to us as we are always here!
Peace and Blessings
Look For The Good and Praise It!