Diary - I didn't feel well over the past few days

[Maybo]

This is an entry from my diary. Please check it and correct any mistakes.

I didn't feel well over the past few days, so I went to the hospital for a check-up. Fortunately, the result turned out to be fine. I didn't drink any caffeinated drinks but my heart still beat harder than usual. I guess I didn't sleep well. It's really important to sleep at a regular time.

 

[tedmc]

I'd say "sleep at regular hours".
I'd omit "over" in the first sentence though it is okay with it.

 

[teechar]

I didn't drink any caffeinated drinks all last week but my heart still beat harder than usual.

Otherwise, consider using a perfect tense for that part of the sentence.

 

[Tarheel]

This is an entry from my diary. Please check it and correct any mistakes.

I hadn't been feeling well the past few days, so I went to the hospital for a check-up. They couldn't find anything wrong with me. I hadn't been drinking any caffeinated drinks, but my heart still beat harder than usual. I guess I hadn't been sleeping well. (It's really important to keep regular hours.)

I might include something like I'm afraid I'm becoming a hypochondriac.

I might go to an urgent care facility if I wanted to be seen right away

You might add that all the tests came back negative.