There's a few yahoo groups about milk kefir too, if you haven't already checked those.
If you really enjoy milk kefir, you might consider taking a break from it, making a new batch and trying it again later. If you still have issues, then you could try to water kefir or kombucha perhaps. Just a thought.
I started fermenting foods to get my probiotics, esp. lacto fermented foods. It is SO easy and tasty! Lots of options to get your probiotics out there.