Period trying to start, but a tiny amount/no blood. also, when i normally have my period, i have a very low blood flow been having extreme hair loss?

Weight loss?: Your symptoms could indicate a hormone problem. Please see a physician for examination and blood tests.

Complex: At your age a period with a light flow could be very normal. While it is difficult to comment on the hair loss (we lose at lot more daily than you would think), this can be a sign of stress and hormone imbalance. Too little or too much estrogen as well as thyroid problems can affect both hair growth and the menstrual cycle. I would discuss these issues with your primary care doctor.

Anemia?: Sometimes a condition called anemia (or low hemoglobin) can cause these symptoms. It's a simple test that can be checked by a general practitioner. Other conditions can also include thyroid or other hormonal disorders.