Hi please help. i feel permanently tired, cold hands and feet, headaches and dizziness. my periods are 12 days on, 10 off. i run a lot and workout.

Need a physical: Being a runner, you need to check your "engine". There could be many things that cause your tiredness. A physical, blood work, etc would be a place to start. Even getting a nutritional evaluation may also help. You may also have to change your running schedule or even take time off of running and change activities for a short period.