How to deal with bad days?
Sometimes you might think about this question when you feel everything is going badly in your day, in your week or in your life. Negative thoughts come to your mind and you start to see everything in black and white. Perhaps you feel sad, annoyed or disappointed, and that’s good, you know, because all your emotions are valid. The problem is when you don’t know how to deal with them or when these emotions take control of your life. On occasion, it’s necessary to disconnect from everything to reconnect with yourself.
Don’t worry about it if you break your routine or if you forget to study or talk to your friend; for a moment focus on yourself and give yourself time, take a breath, ask yourself "how do you feel?" and "what can you do to feel better?" in order to find answers and solutions. Your attitude has a very important role -- don’t forget it.
I changed "we" to "you" in the first sentence because the rest of that sentence (and paragraph) is addressed to "you". Another option: it would have been fine to write the whole sentence from the perspective of "we." It just needs to be consistent.
"See everything in black and white" is a phrase that won't sound right if the order of the adjectives is reversed to "white and black." Another phrase that can't be reversed is "black and blue" (meaning lleno de moretones)...for example, "He tripped and fell. The next day his arm was black and blue." (It would sound odd to hear "blue and black" used in this context.)
I wasn't sure what the best way would be to edit the second-to-last sentence. Another possibility:
"ask yourself about how you feel and what you can (or "could") do to feel better and to find answers and solutions."