Had a recent fall my ct results: normal noncontrast ct the brain. high left parietal scalp hematoma. its been 5days and i am okay in am but in the evening it starts to hurt and i get tired is this normal? or should i go get another ct?

Trauma enough to create a scalp hematoma can give rise to migraine equivalent headaches a week or more after the event. By itself, hurting and getting tired are not reasons for a new study. I would confer with your doc who can decide if you need to come in for an exam. An exam could detect any abnormality that would require further imaging studies.

You appear to be suffering post-traumatic headaches, which will likely gradually remit over the next several weeks. Assuming your symptoms are intermittent as you describe, a second CAT scan is unlikely to result in additional palliation.