I have taken 3test all negative. I feel pregnant. I have been so tired and no energy. I feel faint all the time. Everytime i eat something (no matter what it is) i feel like throwing up. My lower back is killing me. I cant do anything physical lately. Peeing more than normal. Legs hurting. I started my period today, it seems to be normal maybe not as heavy but close to normal and on time. what is wrong with me?