I know exactly how you feel. My husband tells me that I keep a "jump to conclusions mat" in my wallet at all times.

If you can talk it out with someone else, whether that be your husband, therapist, or another close friend, that always helps for me to insert some kind of sanity check into the situation.

People are typically not out to say malicious things, particularly in a support group I'd imagine. If you could ask her about it next week she'd probably put your mind at ease and clear up the misunderstanding.