No problem! Good to know that it works fine now^^
The snail on the swamp would tell you about the love potion's recipe if you had already talked to the snail on the northern side of the deeper forest. But well, the snail won't mention the hint twice after telling you the recipe.
I'll give you some little hints: Love potion needs a berry (not telling which one) and an item that would only be dropped by one specific enemy. While poison potion needs two different kinds of items and both should be poisonous. If you're still confused, you can ask for more hints. Good luck with the brewing^^