No period on depo

So I got depo the 26th of may. I got it on the second day of my menstral cycle. The last few days of my period were VERY light. After my period was done with I had no spotting or anything. So now is when I start my period which is like in two days. Throughout that month of when I got my shot I’ve been cramping usually for me like pms cramps. But that’s all I’ve been getting. People usually say your period will slowly go away. Has anyone’s period just stop after they got their first shot? Please let me know.