I don't know what's wrong

For the past two days my whole body has been in so much pain(my lower back up to my mid back and down to my hips), I feel very dizzy and light headed, I have an awful headache, I feel tired all the time, and my body just feels over all weak. I've been drinking plenty of water too, but lacking a full nights sleep because my back hurts so bad. I don't know what's wrong