Indoor air pollution lung problems frm this? . window in bedroom doesn't open 4months didn't open oth Windows/doors now do. Also fans. Will this help?

No concern. Unless you had some thing burning in the room, like a kerosene lamp or heater, there is no cause for concern for the situation you described. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.