Проверьте на оплошности в грамматике пожалуйста:1) I039;m underweight.It might be a

Проверьте на оплошности в грамматике пожалуйста:
1) I'm underweight.
It might be a good idea to add more food with protein in your diet.
That's not a bad idea.

2) Lack of concentration disturbs me in study.
You might feel better, if you go to bed earlier and start to do physical exercises.
Thanks. I will try it.