Welcome,Lorrie. If the tumor is fully contained within the lung and not outside, then the Stage would probably be II. They will know more after the surgery because they will take samples in the area to see if they detect any escape from the lung.
My wife also has asthma. In fact, since she is not a smoker, we think maybe the irritation from the asthma and allergies over the years may have made the lung ripe for cancer. She did not have a lung removed, but she did survive a severe case of bilateral pneumonia. Best to you both. Don