Upper Left Lobectomy 15 years on, anyone in similar position

Hi

I hope everyone is coping as best as you can.
I am a young 68 year old female who had a left upper Lobectomy 15 years ago and have managed okish, but recently I have got more breathless and wheezing when walking on the flat, and get tired much more easily doing everyday things. Is anyone in a similar position? I tend to have an irritating cough which comes and goes over the years, more so in the winter months. Central heating, change of temperature etc. 
It makes me anxious, which doesn't help, and I will go and see my GP when I can get an appointment but wondering how others are faring who have had a Lobectomy a few years down the line. 
Thanks in advance for any replies  x