New Bronchiectasis diagnosis - need advice

I believe I have had Bronchiectasis for years. I started having exacerbations with pain, extreme fatigue, tightness etc. Pulmo doctors just kept on giving me more and more Asthma medications ( Inhaled steroids, tezspire, formotorol etc etc) which worked somewhat for a while then stopped pretty much. Specialist after specialist were mostly clueless, and just tried to blame me, as if I was not doing my medications etc. I am now seeing a Pulmo at UTSW in Dallas and, I am now asked to produce sputum culture at home. I have not been able to do so. It is so tight in there and very little comes up at a later time, when I "clear my throat". I am about to be on medicare and am terrified by what may lie ahead. I am currently not on any direct treatment for Bronchiectasis other than saline because I have not submitted culture. I was so thankful I found this group to hopefully finally talk with people who know what I am dealing with. Any and all advice etc. is greatly appreciated.