Bleeding between periods 🤨🤔

Okay so I’ve never experienced this before that why I’m posting this. So for the last two months I’ve been experiencing bleeding in between my periods. I have my tubes tied (got them tied 3 yrs ago) and since then my period has been fairly normal maybe one or two days off. Well now I’m bleeding in between periods and not sure why. It usually last for about a day or two and that’s it. Does anyone experience this and if so is it normal?! I’m waiting on my obgyn to call me back with an appointment but was just curious to hear from any other women who may go through this as well.. TIA ☺️