Period / depo shot question

Ok so I got the depo shot like twice after I had my daughter. The hubby and I want another one so I stopped getting it. We knew it could take awhile before I got my period back. So this month marks my third period since I stopped it. My first two were fairly normal only maybe a little lighter than I was having before I got pregnant. This month though it was just weird. It went between spotting and light the whole time. Is this normal after the depo shot?