I have had the depo provera needle three times now. I know that one of the side effects can be irregular bleeding. When I first started taking the needle I was spotting for about three weeks straight then I would spot about once a month, but it was hardly noticeable only when I would wipe. 4 days ago I noticed I was spotting more then usual and today out of no where it was just as if I was on my period. My last needle was 6 weeks ago, and I haven't had an actual period in about 8 months. Has this happened to anyone else? Should I be concerned?