I went for a run today and i felt the most painful cramps in my abdomen ( like menstrual cramps ) . my period is 2 weeks away . what is it ?thanks

Probably ovulation: If you are not using a hormonal method of con (pill, Depo-Provera provera, (medroxyprogesterone) etc.), pain occurring at midcycle is usually associated with ovulation. At that time a relatively large (almost one inch) follicle (fluid-containing sac which contains the egg which is soon to be released) has developed and the "bouncing from running, jogging, jumping can cause it to twist a bit and hurt.