I just had lung surgery for removal of blebs. how long till the feeling goes back to normal?

Variable: Difficult question that is best answered by your thoracic surgeon. The recovery greatly depends on the technique/s used. Vats? Thorocotomy? What is your body shape, i.e. How much space between your ribs? Talc used? Pleural abrasion? Pleurectomy? Etc... In general, deep breathing spyrometer and stretching exercise under surgeon guidance helps. The numbness can take 6wks to months.

Days to weeks: It's normal to feel sore and short of breath. This will improve gradually. Ask your doctor when it's safe to exercise again. Moving and gentle stretching will help the incisional tightness feel better. As you increase your aerobic capacity, the shortness of breath will get better too. You haven't lost much lung tissue, and since you are young you will get back to normal before very long.