My belly cramping in my sides hurts in i got an headache and when i stand up i feel dizzy in my period did not come on what this mean?

Talk to ob/gyn: Not my area of greatest expertise; but, no period combined with belly cramping might mean pregnancy or even ectopic pregnancy. Other symptoms could be due to non-specific physiological changes and may not carry any implication of neurological illness. The most critical finding to follow is the absence of a menstrual period because this implies solid biological clues.