I had these same symptoms for years and I still do. My blood pressure is very low. And I am also anemic. You really should have some blood work done up and get this checked out. Even if it was anemia which is very common with starvation along with lacking other vitamins and nutrients and minerals, supplements might not work that great but you can get injections of iron, and I am sure some others. Anemia left untreated can actually kill you, it's very hard on your organs. So important to get checked out.

I am no longer under weight and the problems are still present. Some of the damage we do to our bodies unfortunatly doesn't repair quickly or ever. I cannot hold onto iron in my blood any longer, I am lacking protien in the blood that iron clings to. So about once a year or more I go and get rounds of iron shots. Also I was lacking vit k,,a,and b. Which gave me lots of complications including bleeding under the skin.

So please try to take of yourself, and maybe get a full work up done so you might avoid serious problems later on.