About 2 weeks after my period, I always get this sever but short cramp in my abdominal monthly is that ovulation? And how do I know when im ovulating?

Yes. Not uncommon about two weeks after last day of period. When ovulating not uncommon to have a very small amount of blood. The lining to abdomen and pelvis the peritoneum does not like ANS response is pain. There are tests for ovulation.