The only people who are mad at you for speaking the truth are those people who are living a lie. Keep speaking the truth. Some people believe their own truth, just because they can't handle a person with a borderline personality.
So many people assume and think they know what life with Fibromyalgia is like, but what they think is usually extremely far from the reality of living with it. So few, that do not have this illness, will ever know the truth.