Exhaustian and bruises before my period

[amummienetter]

A week before my period I have been getting severe fatigue and I mean severe, breathlessness and big bruises on my legs. These symptoms miraculously disappear once my period starts and then returns a week before the next period.
I could understand if these symptoms appeared once I start bleeding, as then I may have possible anemia or something along those lines, but the symptoms always arrive before.
I am getting scared..

If you haven't already I'd go to the GP and have this checked out properly. Going to the doctor will give you more answers, you need that more than anything else currently. Don't let fear stop you from going to the GP.

It could be that you're anaemic but that can be treated.