Hi all, I was diagnosed with BC 2yrs ago this month, I’m 55yrs old, I’m on tamoxifen and take omeprazole to combat acid reflux, since Xmas I’ve started doing the 5k park run every Saturday, so good to get back into running again, as I missed it so much going through chemo, I really enjoy it, but struggle with my breathing, I never experienced this before my cancer while running, not sure if it’s the medication I’m taking, or the after effects of chemo, has anyone else experienced this.x