There is also a script med, valacyclovir, that is an anti-viral that if taken at the very first tingle of a cold sore, will stop it in its tracks. Have to take two doses, 2 tabs 12hrs apart, but the darn stuff does work. Not horribly expensive, either. They are horse pills....huge,....and you're not supposed to crush them, but probably could be cut in half w/o issue.

On the stomach thing, might try 1 tbls of apple cider vinegar in about 6-8 oz of cold water. Sip that and see if the stomach calms down and quits hurting. Don't do it daily, or for long periods, but it's a great short-term help to get ya by.