So I've noticed the last few months I seem to really come down with flu like symptoms, migraine,…

So I've noticed the last few months I seem to really come down with flu like symptoms, migraine, sickness ,fever, stomach problems, shivering and pains. And it always end in me having a period and I thought maybe I was so run down I was causing a period. But having happened yet again I googled period flu and apparently whilst not scientifically proven, it is experienced by a lot of women due to hormone levels. Does anyone else suffer this? I literally feel on deaths door every 4-6 weeks plus I'm anemic so losing the blood knocks me too