Maybe you're just catching a cold! I'd say continue with it, maybe isolating it from other cheeses until you can determine if it's ok. What is your homemade starter? I made a traditional Lancashire cheese which required making curds 3 days in a row. The first and second days curds had a really sour smell, which was caused by acidity, and sounds like your description. After combining with fresh curds, and salting, the smell was gone. We're clearly talking about very different cheeses, but you might find that the acidity will mellow out. Give the cheese at least a week before deciding to throw it out.