Physicians only please, I need serious answers. I lost 30 pounds without trying in a few months time.?

I am tired, get night sweats, I have lumps all over my neck. I feel weak, I can not hold things without dropping them. I have passed out twice and went unconcious once.My husband had to keep my airway open. prior to this event I felt like I was hearing them talk as if I was under water, I could not understand them, I did not go to the ER,because I work at one and felt stupid. I have no added stress, I eat well, I do not have any mood disorders or eating disorders. Per a psychiatrist. I weighed 120 went to 91, I started gaining weight and now I am loosing again. A doctor at the Mayo said he thought it was a rare virus that causes "unexplained extreme weight loss" just eat more. I get short of breath and feel like my heart will beat out of my chest. I am scared it is cancer but the couple of physicians I was referred to treated me like I was a blonde who was not eating and would not look for other causes. I am scared and can feel something is very wrong. I would appreciate any help.

Physicians only please, I need serious answers. I lost 30 pounds without trying in a few months time.?
Okay, I am not a physician, but go get a second, third, forth, etc. opinion ASAP until you get a correct diagnosis. I have known people where it took years to get a correct diagnosis,,, my cousin, for instance, has Lupus... for over a year when she was trying to find out what was wrong, the doctors told her it was "all in her head" until she was finally diagnosed. So, please don't feel scared or embarrassed because the other doctors have brushed you off. Find a doctor who will listen... this is your health. Sometimes, as a patient, you have to be persistant.
Reply:ok call a reliable doctor and you need to something QUICK before you break out in more sweats or before you DIE so you contact that doctor super quick if your life depends on it!
Reply:If you want physicians only, and in your own words "feel something is very wrong" FORGET WORK!! Get yourself to a doctor now!!!!!!!!!!!!!!
Reply:check your blood sugar and look to see if the food you eat has mono sodium glutamate in it. MSG .it sounds like symptoms I had before they found out I was having nocturnal blood sugar spikes and that I was allergic to MSG. go www.msgmyth.com and look up foods that have it and what the symptoms are.And go see another Dr. until you find one that can give you a diagnosis you can live with
Reply:I'm not a doc. Have you had the thyroid checked? Sounds like Grave's to me.