The longer you can hold off the better but the first 24-48 hours is crucial. After this time period the blood clot should have formed and healing has started to occur. Although smoking at any time will still delay healing after the 48 hour time period you should be fine.
It sounds like a chemical or allergic reaction to the mouthwash. First, you should not use it again. Warm salt water or tea can help the area feel better. There is a perscription product called Gelclairwhich is almost mraculous in speeding healing and instantly increasing comfort.
I would suggest seeing a board certified oral and maxillofacial surgeon. They are experts at wisdom tooth and broken tooth removal and should be able to offer you options for sedation so the experience will be as pleasant as possible.