Was the 10 drop dose the first time you've swallowed that many drops at once? That may be the reason for the stomach distress. My brother swallowed an 8 drop dose, brushing his teeth, and had a major herxheimer reaction - I thought you had just held the 10 drop dose in your mouth - - I'm glad you remembered the orange juice tip - it will stop the mms in it's tracks. But then, I'm not a good one for pain
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In the US, we have DMSO in our animal/farm stores. It is used for tissue injuries in horses, like sprains and so on. It has some special properties - such as, you don't want to apply with rubber gloves, because it will take the rubber itself into the tissues! We also carry it in our health food stores. I seem to recall that it is difficult to find in some of the EU countries. Good luck!
Other questions - sure - if it's on anything other than teeth, you might start a new topic or find one already started (just so others later searching for info on it can locate it easier - also, if it's in it's own topic, others might chime in, if they have history with it). Happy to share, if I can.