All depends on your level of clean. The cleaner you get the easier the periods! I have gone from monthly bouts that would almost send me to the ER to absolutely painless -- and nearly odorless -- periods. Amazing!
Whether you do the swf or not depends on how you are feeling at the time. DO keep your colon clean every fasting day. I find a plain water enema handy to substitute when the swf is not comfortable or convenient.