What Causes Delay In Menstruation Other Than Pregnancy?

Hi, my period was 2 days late, just started today, but the blood only comes out when I urinate/ push. My breasts hurt a lot more than normal when it comes to my menstrual cycle symptoms. My cramping is slim to none compared to my normal symptoms and I m feeling them more in my lower abdomen area. I ve been craving a lot of foods I don t normally eat and avoiding foods I normally do eat cause of the smell. I took a pregnancy test and it came out negative (I m pretty sure i did it way to early for the test to detect anything and I did do it at night.) Based off what I put, do you think I should take another test or wait it out and see how long the period lasts?