I Am 45 Y Female. Presented S/s Of SOB About

I am 45 y female. Presented s/s of SOB about a month ago rapid heart dizziness weakness. Ambulance to hospital 2x cardiac monitor nothing o2 seats 98% pulse and by changes. Been to primary dr probably panic attacks. Take Xanax symptoms still start w sob go to cardio 24 monitor nothing seen. Allergist says probably allergy induced asthma. Symptoms still happen every couple days full blow starts can’t get deep breath nasal swelling then heart palpitations dizzy weakness