This has been a real struggle for you--we're proud of you for hanging in, even with a little "cheat" now and then.
Give the fast a chance to cleanse, detox and heal. What are you puking? SWF? Well, don't do it! Do a plain water enema instead and save yourself the grief. Worth learning to do if you are serious about cleansing.
Peppermint tea is ok. Chamomile is nice too! If you need to deviate from the MC, these teas are the way to go. Sweeten with maple if you like.