Depo shot spotting

hi ladies I went on the depo a month ago. I didnt have any issues or spotting until last weekend. it's been non stop ever since. how long did your spotting last ?

unfortunately the depo shot is being used as a preventive medicine for a severe chronic illness I have. since being on the depo my every day symptoms have gone down tremendously so i don't plan on getting off the depo any time soon.