Spotting makes sense if you missed three pills— your body had a withdrawal bleed without the hormones there. Basically like taking a lil break week. Once you’re able to maintain a consistent pill schedule and your body adjusts to that rhythm, the bleeding should become more regular, hopefully. Like @onthepillxo said, you may be unprotected. If you rely on the pill for pregnancy prevention a backup method might be needed. Missing pills is more risky during the week before or after your break week.