What Causes Recurring Asthma Attacks And Breathing Difficulty?

HOW MUCH IS IT ? -May not be able to get the answer--but this question might help some one else--and I THANK YOU MUCH if I can,t afford to pay and if there are no answers for me-. -I do have adult asthma of severe attacks- off in on. Pretty healthy most of the time other than headaches often.-----I keep Symbicort with me -close by most all the time.and only use it when necessary. Plus nebulizer.with Albuterol with but the last Dr visit with my lung Dr was upsetting. I was having a very hard time breathing at the time.-Just gasping for air.-- The Dr. listen to my chest and back with a stethoscope and told me my lungs were getting better -come back in six months. That was it. Have not been back even through its been over six months but still having attacks now and then. Sometimes I get chocked easy -start coughing and have a bad asthma attack. Some days are really rough-, in trying to breath normal . I don,t smoke-nor drink and never have but was around second -hand smoke a lot and worked in a air polluted place. What would you suggest --not easy to find a new Dr. but wondering if I Should.---Thank you for any suggestions. One lady at church says it,s all in my head -breath deep and I will be fine. So wrong she is, but I just let it go and wish I could breath normal.