Bleached (edit of Bleach)

[svanhoeven]

How to describe how I feel some days,

Basically you're introducing a list. To add to Stalker's comments, in order for the reader to understand "a list follows...", you could make it a question, i.e. "How do I describe X?". As an alternative, you could make it more declarative, i.e. "This is how I feel some days...". Then the list follows.

Also, to begin the list, you may want to separate the first and second lines (or items) better. For example,

The milk that curdles in your tea,
or when you try hard to be carefree, <=adjust for meter as necessary

You wouldn't need an "or" on any subsequent line; the reader will imply that if you set it up right.

Also, on line 2, I'm not sure if you're referring to being medicated, or depressed. If medicated, you could make it clearer maybe by referring to the medicine's name instead of serotonin. There are plenty- pick one that works with the meter.

I did like the "the stink of your own tooth decay." line. Olfactory imagery has a lot of emotional potential since smells seem to bypass the intellect.