Some years ago, when I was still at University, there were
'where'/'were' - I have to watch that myself when I'm typing - the fingers have a mind of there own!)
periods of time : a 'period' is a length or portion of time. For the style/tone of your essay, perhaps the better option is:
times when I felt really stressed. I guess I always tend to overburden myself with work, because apart from the lessons, I was working and learning English. I am quite used to doing a lot of things and, deep down, I can cope quite well with that; but during the exams I was irritable and very tired. And, of course, it was my family, friends and
couple who paid for it. Do you mean 'my relationship' /my boyfriend?
Maybe I could have asked for a vacation at work or could have taken a break from my English lessons. However, I always think I can endure (the-omit) situations because "it's only for one or two weeks." Another solution could have been to take some vitamins to
concentrate myself better. : to help me concentrate better
Anyway, I passed all my exams and went on holidays that summer/in the summer
in summer : you are writing about a period in your life a few years ago. This is a particular summer, the summer after your exams.
compare: We generally go on holidays in summer.
with my boyfriend (and
get relaxed sunbathing on the beach!). You 'went' (past tense) on holidays, so you 'got' (past tense).
got relaxed on the beach!)
In stressful situations,
the worst part is for my health :the worst part is how it affects my health
the worst part is how it affects my health: all my
nerves concentrate on my neck and back : I'm not sure what this physical sensation is ! - so the best I can suggest is: nerves seem to concentrate on my neck and back
And as I am many hours sit studying my legs are numb too. : And as I sit studying for many hours/for hours on end, my legs go numb too.
My secret is to stand up and walk for a while each hour and to do some exercises to stretch my muscles. It's not
the panacea but it works. : I'm not sure why you are using 'panacea', since you have mentioned only the nerves in your neck and numb legs...and with these two conditions, the exercising does work!
Nowadays, as I am working, my life is not as stressful as then, although sometimes we are
overloaded at work. :I think this might be a better choice here than 'with', because you have used 'work' =in employment, and now kinda...kinda...writing, 'in my work I'm overloaded with work'. You have said you are 'out working now' (have employment) and so by using 'at', the meaning is now towards, 'but still, even at work, we can get stressed out at times because of all we have to do.'
I am still learning English but in a more relaxed way. I think when we are young we can take everything without
many effort : I'm not sure you mean 'effort' - it is not how vigorously you work at something, it is the 'effect' of it on you and your body.
because our body is strong and full of vitality. Anyway, my back and neck are grateful I have finished my degree.
(Nice ending. You remembered the comma after the final 'anyway' - don't forget them when you have introductory words and phrases - that is most of the red above.
Completely separate note:
Another solution could have been to take some vitamins to
I'm sure someone will query, why 'could' and not 'would'?