Yesterday i hit my head twice, once in the front and the top of my head and once on the left temple. i've had a moderate to severe headache ever since, ?

You should be fine: Unless you were knocked out, have vomited or had a serous mechanism of injury, (projected out of a car, fell from a height etc ) you should be fine. If it does not resolve in a week or gets worse go to a doctor.

Headache: You likely have headaches from the repetitive head trauma. The best way to know if you need further testing is by seeing your physician or go to express care or urgent care. Possibilities include concussion. However, more serious conditions can result from head trauma.