Why do dairy products suddenly taste bad?

I have a weird problem that happened to me once when I was maybe 8 years old (I'm 20 now). I woke up one morning and all dairy products tasted horrible. They tasted as though they had gone bad. I'm not sure how long it lasted back then because I just stopped eating all dairy products for a couple of years — I was afraid they would taste bad, but it definitely lasted several months. When I started to have them again they tasted fine. It seems to have started again. What could possibly be the cause of this?


Is there a way to stop being so sensitive to noise?

I have sensitive hearing. This is a major problem when I am trying to go to sleep. I find myself singling out every noise. Currently, I live in an apartment close to a major ventilation system. I can hear a very low frequency sound coming from it. It wouldn't bother me except for the fact that it is a random, consistent noise. Think of a ticking clock that doesn't tick at an exact rate, but ticks once, twice, maybe three times every second.

However, my roommate cannot hear this sound and my girlfriend can only hear it if she really strains to. Myself, I can hear it over music, TV, running water, etc...

I am beginning to envy people with hearing disorders. I am at the point I'd be happy to be deaf.

My question is: Is there a way to decrease my hearing ability at least in the lower frequency range?

Thank you.