Could you correct my entry, please Many thanks in advance

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Hi!
How are things? What's the weather like? It's hot but blustery here. ('Blustery' is correct, but not very common. Perhaps 'quite windy' sounds more colloquial)
Tomorrow I must go to the GP to take get a referral to (see) a thyroid specialist. My recent medical check up showed (that) O I have a hormone imbalance, plus my thyroid glad gland is enlarged and contains nodules there are knots in it. As for my blood pressure, that's it's ok,  but my a pulse is a bit faster than it should be.
We started a fast today as an act of devotion to (Jesus' disciples) St. Peter and St. Paul From today we have Fast devoted to Disciples of Jesus-Peter and Paul. In the morning I had a porridge without milk but at work for dinner I couldn't resist seduction I gave in to temptation  and ate a chicken cutlet for lunch. Plus, I have had a packet of sour cream left in my fridge so which I decided to eat anyway I should eat it up in spite of the Fast.
I am looking forward to my holidays at time off from work. All of us who work there coworkers are counting down the days until when we can are free to enjoy ourselves.
Now I must finish as I am going for a walk with my daughter. (Very abrupt. Perhaps 'I have to finish for now as I am off for a walk....)
Write soon

Corrections in red.  Stylistics and variants in blue.

Could you correct my entry, please?  Many thanks in advance.

Hi!
How are things? What's the weather like? It's hot but blustery here.
Tomorrow I must go to my GP to get a referral to a thyroid specialist. My recent medical check-up showed that I have a hormone imbalance, plus my thyroid gland is enlarged, and it has nodules. [1] As for my blood pressure, it's ok, but my pulse is a bit faster than it should be.
Starting today we are observing (we have) a fast devoted to the disciples of Jesus: Peter and Paul. In the morning, I had a porridge [2] without milk, but after [3] work, for dinnertime I couldn't resist the temptation and ate a chicken cutlet.  Plus, I had a packet of sour cream left in my fridge, so I decided anyway I should eat it up in spite of the fast.  [4]
I am looking forward to my holidays from work. All my coworkers are counting the days to when we can enjoy ourselves.
Now I am going for a walk with my daughter.
Write soon.

[1]  You need an ultrasound.

[2]  Variants:  I had porridge. (uncountable)     I had a bowl of porridge.  (countable)

[3]  I think you meant "after work" and not "at work".  If I'm mistaken, sorry.

[4]  The idea of "anyway" is already contained in "in spite of".  Good variant:  "...  I should eat despite the fast."  Remember:   "in spite OF (something)"    "despite (something)"