i have this and find a warm water bottle for few hours helps always helps me clear my chest .

I have very mild copd also. When I start coughing a whole lot my pulomologist puts me on steroids and antibiotics . That always helps. Better to stop it before it gets worse he tells me. Just got off of them today. No coughing just need to clear my throat every now and then

I was put on carbocisteine 375 mg x6 3times a day last year for a mucus blockage when in pulmonary ward last year and this helps loosen up mucus.

I went to my doctor with sensations like that, and he said he had no clue what was causing them, since the pains were traveling. I said, Should I go see my GP or a heart specialist, he shrugged and said, If you want to. Looking back on that now, I laugh. I got another doctor.
My particular symptoms went away eventually, but I think you're smart to stay in contact with your doctor till you feel better.

Yes I do pluse spasms
I needed electrolytes
Plus a muscle relaxant and something for the terrible pain