DEPO??

I received the first shot of Depo the last week of November. I got my period in December, on the 19. It lasted for 7 days. It stopped for about 5 days and now as of yesterday, it started again. Has this happened to anyone else? My boyfriend and I had protected sex about 4 different times when my period stopped. However, now that it is back - I’m confused. I also have had frequent urination, as of yesterday.

Thank you.