I felt sluggingsh in the morning. I felt sluggish in the morning.

I felt sluggingsh in the morning. I felt sluggish in the morning.

I sleep sometimes topt throughout the day. I slept throughout the day.

I sleep sometimespt a fair amount today. I slept a fair amount today.

"Slept" is the irregular past tense of "sleep". English has an annoying amount of irregular verbs like this unfortunately. "Sometimes" feels a little strange here and it's hard for me to explain why. If you want something in-between "a lot" and "a little", I might say "a fair bit" or "a fair amount".

But Mmy physical condition do not become goodidn’t improve. But my condition didn’t improve.

But Mmy physical condition do not become goodhasn't gotten better. But my physical condition hasn't gotten better.

A more grammatically correct version would be: "...condition did not become good." "Did" is the past tense of "do/does" (and when using the verb "to do" in the present tense, it conjugates as "does" before singular nouns that are not "I" or "you". I do not, you do not, they do not, those things do not, she does not, it does not, my condition does not, etc) However, "has not gotten better" (contracting to "hasn't gotten better") sounds more natural to me here.

Today, I’ll sleep early. Today, I’ll sleep early.

Today I'm going to sleep early. Today I'm going to sleep early.

If something will happen in the future, we almost always conjugate into future tense, either with "going to" or "will". We might use present tense when we really mean future, as in "next week, I'm cooking dinner for everyone!" or "tomorrow, I clean my room!", but this has a commanding tone to it and isn't used in normal scenarios. Alternatively: "Today I'll sleep early"