Mentally, I'm resisting the idea of getting back to work, mainly because I haven’t fully recovered. Mentally, I'm resisting the idea of getting back to work, mainly because I haven’t fully recovered.

Mentally, I resist the idea of getting back to work, mainly because I haven’t fully recovered. Mentally, I resist the idea of getting back to work, mainly because I haven’t fully recovered.

NA / This nasty cough has been driving me nuts A / This nasty cough has been driving me nuts

Sounds better if you include an article (the/an/a) when introducing a noun

A cold which has been lasting almost a whole month makeshas made me kind of frustrated and feel like a helpless puppy curving at the corner. A cold which has been lasting almost a whole month has made me kind of frustrated and feel like a helpless puppy.

I'm not sure what you mean by "curving" here, so I simplified the sentence a little.

A cold which has been lastinged almost a whole month makes mehas made me feel kind of frustrated and feel like a helpless puppy curvowering atin the corner. A cold which has lasted almost a whole month has made me feel kind of frustrated and like a helpless puppy cowering in the corner.

RA relentless cough is really no joke, and I already took two weeks off for it. A relentless cough is really no joke, and I already took two weeks off for it.

RThe relentless cough is really no joke, and I already took two weeks off work for it. The relentless cough is really no joke, and I already took two weeks off work for it.

I’m going to be back ato work tomorrow. I’m going to be back at work tomorrow.

Or, "I'm going back to work tomorrow."

I’m going to be back ato work tomorrow. I’m going to be back at work tomorrow.

At the beginning of themy sickness I tried to live the life as usual, so I went to the gym as if I was unstoppable. At the beginning of my sickness I tried to live life as usual, so I went to the gym as if I was unstoppable.

At the beginning of the sickness I tried to live the life as usual, so I went to the gym as if I was unstoppable. At the beginning of the sickness I tried to live life as usual, so I went to the gym as if I was unstoppable.

I remembered c Coach Huang- the owner of the gym- saw me saying“ wand said, “Why don’t you just stay home and get a good rest?” I said nothing but doingand did the double biceps pose and the most muscular pose towards himflexing pose, which made him laugh. I remember Coach Huang- the owner of the gym- saw me and said, “Why don’t you just stay home and get a good rest?” I said nothing and did the double biceps flexing pose, which made him laugh.

I remembered coach Huang- the owner of the gym- saw me saying“ id to me: “why don’t you just stay home and get a good rest?” I said nothing, but doing the double biceps pose and the most muscular pose towards himposed flexing both of my biceps, which made him laugh. I remembered coach Huang- the owner of the gym- said to me: “why don’t you just stay home and get a good rest?” I said nothing, but posed flexing both of my biceps, which made him laugh.

I’ve taken a few words out which I think make the sentence a little easier to follow.

I was coughing so severely that I assumedfelt like my lungs would come out of themy throat along with every single cough. I was coughing so severely that I felt like my lungs would come out of my throat along with every single cough.

I was coughing so severely that I assumed my lungs would come out of themy throat along with every single cough. I was coughing so severely that I assumed my lungs would come out of my throat with every single cough.

Apparently my body abil's immunity doesn’t match my mental toughness . Apparently my body's immunity doesn’t match my mental toughness.

Apparently my body’s ability doesn’t match my mental toughness . Apparently my body’s ability doesn’t match my mental toughness.