Yeast gone wrong :(

I had froze some yeast bread back in March, it was 1/2 white & 1/2 wheat. Well I let it thaw for a couple of hours, and opened the freezer bag to an awful fermented like smell. :<( yucky! So I figured well it may taste different than it smelled, to my surprise it tasted a little fermented too. *sigh* I don't know if it was because the bread was half and half, or because I have never really froze bread, I just make one or sometimes two loaves for the week or whenever we want homemade bread. I may try with the freezing of the bread again, who knows it may smell different.