I've stopped eating much cheese just because it doesn't taste good to me anymore - I still like it melted in omelettes but not just a chunk of cheese. Yesterday I tried a small slice of the 'good brand' we bought (because the store brand just tastes like salt and mold to me now!), and
1. it didn't appeal to me
2. I did get a bit of heartburn.
I hadn't made the connection between the heart burn and the cheese until reading your post, but I bet that was it