Have these pains n my head that come a lot but they don't last long enough to make me have to take something 4 them but its often had mra, ct, mri norm?

Imaging not common: If i understand your question, it would not be normal to have an mri/mra/ct for frequent headaches in a 20 year old female. If your headaches were becoming progressively worse over weeks to months and not responsive to treatment i would consider an MRI to look for secondary causes. You may be interested in the clinical algorithm: https://www.Icsi.Org/_asset/qwrznq/headache.Pdf.