Sorry to hear you're feeling unwell. I can speak only about the bronchiectasis.

Body aches and weakness happened to me with a bronchiectasis exacerbation, which I used to experience every month or two, even with twice a day airway diligent clearance. I'd produce green mucus, very yucky, and feel like I had pneumonia. Oddly, my sputum culture grew nothing (which I dropped off before starting abx). It turns out the culprit was reflux; small aspirations, likely during sleep, would irritate my sinuses and/or end up in my lungs. Once I raised the bed along with sleeping on a wedge (approx 30 degree angle in total) these frequent exacerbations with the chills, body aches etc went away. Also, my sinus issues also ceased. I also paid very close attention to strict food/drink restriction 3+ hours before bed along with avoiding food triggers (onions and dark chocolate.)

I figured it was worth sharing my experience in case something like this might be happening to you. I hope others will weigh in on the meds you're on and also the MAC.