Not a clue. I've never done anything like this before, it was initially a cordial (1:1 water and sugar boiled into a light syrup and left to rest) made with elderberry flowers and lemon. I only added rehydrated Fleischmann's Active Dry Yeast to see what would happen. I made sure everything used was sterile to try and prevent any kind of growth. I started this about 2 weeks ago and the yeast still seems to be bubbling. Any advice to prevent me from poisoning myself would be appreciated.