Help!!

abigail

I had sex on the 9th of June (no he didn't cum in me) I took a pregnancy test on the 26 of June and it came out negative on that same day I took the depo shot for the first time and My period is 8 days late but I've been cramping and having all of those up coming period symptoms but no bleeding . Has anyone (first users on depo) experience no bleeding on the depo shot ? Is that normal ? Or should i test again?