SWF when doing P&B cleanse?

I've been doing the P&B shakes now for 5 days--I'm up to 3 a day now. I am drinking more than my weight in ounces of water and I am eliminating regularly, but I still feel blocked up. Is the SWF (Salt-Water-Flush) dangerous to do when on P&B's? I have never done an enema before--kind of scared to, plus at the moment I don't have anything like that in the house and I really want to get things moving. Would the SWF (Salt-Water-Flush) work or would this only cause more trouble? My head is killing me at the moment and I figure it is either from constipation or the parasite cleanse.