Quitting Medication with Hashimoto's Disease?

What could happen if you have Hashimoto's Disease and stop taking your medication? Nothing, right? I ask because I am recently diagnosed. For years I've felt poorly and my "symptoms" were all over the place. I was misdiagnosed (and probably was yet again) several times before a regular physical found a goiter and tsh levels elevated. After many more (un-necessary) tests my endo says I have Hashimoto's and not Hypothyroidism. My husband isn't buying. I am not buying it. My family is not buying it. The symptoms are the same as getting older. I have gotten into many arguments trying to get people to believe this "illness" was diagnosed and have decided they may be right - this is all a symptom of hypochondria and not a real illness. I've read other peoples stories who have it and I am sorry, but they sound crazy. I know how I must have sounded now to everyone who is refusing to believe a doctor diagnosed me with anything at all. I don't want to see the doctor or take the meds anymore. If there really is such an illness - that's not in your head - what would really happen? Would I just get tired and all that other stuff again? I can live with that. I can't live with people shaking their heads and laughing at me and my fake illness. I really do think this is all in my head like everyone else does. You can't die from this, right? I mean, it's not even real...