Hi again
A new Doctor may help, I know it'll be weird and daunting, as you'll feel a bit anxious, however, they may have the answers you are looking for.
So you've moved to a new area, jeeeze, didn't that cause you a lot of stress ?
I'm not saying this caused you your breathing problem, but it may have contributed, along with giving up the smoking too ... you must be one hellava person, to give up and move house at the same time, and it may have just taken a bit of 'wind' out of you.
Are you feeling tired too? as you may be experiencing fatigue and anxiety ..
Try and relax a little, and do a little breathing excersise .... breath in.. hold it till the count of 3 and then out ...slowly.
Do this over, and control the breathing.
Make an appointment to see a new GP, explain to them what you are feeling, what you've done over the past few months and they'll try and help ... it may be over exertion, fatigue, anxiety and the quitting that has just taken it's toll, and the dizziness is due to not getting sufficient Oxygen whilst breathing to the brain.
I could post this into the Anxiety and stress forum, but only if you want me to .... let me know if you think this may be the problem...
I can also ask another Moderator for any suggestions, to help and support further. We're all friendly here, so no need to worry.....
Keep us posted, and take care
Ginger