feeling Like I have no control over my body

I have to go get blood drawn soon to test for anemia. Just a little note. So I just started my period about 4 days ago and for the first time ever I have been feeling very week and kind of fragile if that makes sense, I'll get up and be walking and when I go and lay down after a little my legs get almost numb and my whole body feels odd then it feels like my whole body is moving. it isn't from getting up to quick or anything like that, But I'm constantly feeling like that. could it be me being possibly anemic or is it my period or both or maybe something else? advice? note: never once on my period have I felt like this and I have been aware of me possibly being anemic for months. yes I drink plenty of water and yes I'm eating enough.