Have Been To Several Dr.'s For Unexplained Angioedema. Started Beginning

Have been to several dr.'s for Unexplained angioedema. Started beginning of July. Happens mainly in the evenings, occasionally during the day. It has changed from occasional (4 - 5 x's a month) to more regularly (2-5 x's pr week), the welts and /or swollen areas use to go away after 2-4 hours and now lasts 6-24 hours. Mainly happens at home, but has happened outside of house. Never at work. Body welts / hives are extremely itchy - lips get numb and tingly and swell. Body hives make me anxious from non stop itching. I take adderall during the week, benedryl most nights - it happens both off and on these medications. Allergist seems unconcerned. Said it should run it's course and could last up to a year. Under a lot of stress. He doesn't think it's stress related. Said most likely auto immune. Should I see other dr. Or not worry about it