I also have been diagnosed with copd and have never smoked in my life, so the diagnosis was a great shock to me at the time, and I was really scared as well. However, I learned a lot from friends on this forum and came to realise that it is not a death sentence at all, and you sound far fitter than me. The help I received from the BLF helpline was also invaluable, and gave me tips on what to ask the doctors and what to expect. If you want they can also send you out information, or it is available for downloading.
Being able to exercise regularly is so important in keeping your lungs from getting worse and can actually improve your condition. If you hadn't kept so fit, you might have been at a worse stage than you are, so keep running if you can. There are a number of people on here with moderate and severe copd, who continue to work and lead a normal life, go on holidays, outings and generally just continue as usual while taking care to look after themselves at the same time. Getting the flu vaccine, and keeping infection free is important too. Using Vicks First Defence spray at the first sign of sniffles helps stop a cold developing and as you have a young family, no doubt they will be catching all sorts of viruses, but Vicks First Defence really helps.
Honestly and truly you will find you are able to live your life as normal, although you may get the odd setback from time to time, but that happens in everyday life anyway.
You will be fine happiness, just keep an eye on any infections and continue to keep fit, eat well and enjoy each day!
hugs from Huggs xxx
ps You didn't mention any inhalers, but if you are short of breath then you maybe want to go over treatment with the doctor or consultant. I was prescribed Spiriva which made a huge difference to my coughing and shortness of breath. Also, if you are coughing up a lot of mucous then something like Mucodyne can help with that as it loosens and thins the mucous so making it easier to cough up any gunge.
Good luck, and if you haven't already done so, then contact the BLF helpline. Mild copd is not a death sentence Happiness, not at all, and keeping positive helps, as well as humour. I have learned more on here than from any doctor so keep posting and someone will always be around to help.