Is it possible for your body to get used to a birth control after a certain amount of time, and just stop working???

Last month I spotted on Sunday and Started on on Monday (Normally I Start on a Tuesday and end on Friday or Saturday). This month this past Thursday I was spotting VERY LIGHTY and they Friday it was still VERY LIGHT but a bit darker (not much though). Now today, I’m still spotting but it’s just a bit darker but still very light. I’m not suppose to start till Tuesday of this coming week. I’ve been on this birth control, for a year and like 3 months and I have never had a problem with it, till last month.

Is it possible that my body just got used to it, and it’s not working anymore?