What Causes Irregular Light Orange Spotting,headaches And Nausea?

I'm having some issues with my menstrual cycles, and my last one ended ten days before I started my current one. This one, the flow is MUCH lighter, and the blood is almost an orange color. I do have a history of being anemic, but I have other symptoms such as nausea, especially if I don't eat, which I used to be able to go almost two days without eating, but now I have to eat constantly or feel sick. I also get tired a lot, and have to go to the bathroom frequently. I get headaches easily, when I used to never get headaches, and I smells seem stronger. Water tastes funny to me, and I drink orange juice now, and even that tastes a little off. I have no idea what's going on.