My period flow is weird

Shailoh

So I’ve recently been taking birth control for the past two months and I am currently on the last week of my second month. I started my period today but it is super light and my flow keeps going on and off. I’ve only had two flows today and right now there is no blood at all. Me and my boyfriend were paranoid the past week thinking that I was pregnant. Could this be implantation or the side effects on my combined birth control pill?