it dont appear to be a case of lead toxicity from your symptoms. as you have been working wth old windows and door frames, its just that dust from them is causing all these problems. you have to start wearing mask while working with them. also try to remain away from them for some time, as for heaviness in lungs and throat and dry cough
, do steam inhalation 4-5 times a day. also avoid cold
water. do warm saline gargles also. take NYQUIL
before sleep. it will help you with all your symptoms.
wishing you good health
with best regards