Sounds like the MSM could be the issue if you noticed nausea again after taking it.
The clay, being ultra-absorbable will absorb whatever else you're supplementally taking, unless you take the clay first thing in the morning an hour or two before taking anything else - or last thing at night.
Another thing to consider is that cloves are histamine forming. I didn't know this at the time i did my parasite cleanse, and as i am histamine-intolerant, the stomach cramps, nausea, leathargy and brainfog i developed straight into the cleanse leads me to now consider that perhaps the cloves caused many of those symptoms - so if you know you're sensitive with histamine that's another angle to consider.
What else to use other than cloves i don't know! I still have many para-cleanse capsules left and know cloves are an important part - perhaps that's why some not so sensitive to histamine do well on the cleanse and carry on with their everyday life, while others go through bowel-hell and can barely get out of bed?!
If you're taking a parasite cleanse with all the herbs separately maybe if after cutting out the MSM, you could try cutting out the cloves and continue with the other para-herbs to see if cloves are the problem for you also?