Which sentence is correct?
-Why do you got sick? / Why did you get sick?
-I was busy for my work, so I haven't noticed your message.
I was busy for my work, so I didn't notice your message.

Question

Which sentence is correct?
-Why do you got sick? / Why did you get sick?
-I was busy for my work, so I haven't noticed your message.
 I was busy for my work, so I didn't notice your message.

Answer

Hi, 
How are you, Sue?
1. "Why did you get sick?" is correct.
2. These sentences are both grammatically correct. The difference is only in the time of them

Answer

Hi :),

-Why did you get sick? 
-I was busy 'with' work, so I didn't notice your message.
.. the other sentence can also work if ..
-I was busy with my work, so I haven't noticed your message. (Present, Report speech)