Spotting way too much

I've been taking birth control for years. I first started to control my severe menstrual cramps and heavy flow. It's worked fine, but recently I've been spotting a lot. I'll have my period. It will end. And then a few days later, I'll start spotting and it will last for days. Sometimes it will stop, but it could come back later that day. Has anyone had this issue? I'm thinking about switching birth control methods or something. It's really annoying. I feel like I always need to have a pad on my underwear.