Early symptoms of BC that spread to lungs?

Hello,

I was diagnosed in June 2016 with IDC, Stage 1, Grade 2 with no spread to the lymph nodes or to the blood vessels. I had surgery in September 2016 and it's been a year and I have had good blood work since then every 6 months my doctor tests me. But a month ago I came down with a cold and had a cough and it's been 3 weeks since the cough started, but there are still remnants of it. It's the kind of cough you get when you go outside in cold air and breathe in, it's a catching cough I would describe it as. I also find myself short of breath when doing simple things like walking up the stairs. I was wondering if anyone here has had BC spread to the lungs and what your earliest symptoms were like? I made an appointment with my MO just for him to check it out for me, but in the meantime thought I would reach out to the BC community to see what early onset symptoms are in some people.

Thanks in advance,

Misty