I started my period yesterday but there was no blood this morning. this is my first period on my new birth control that's supposed to help my periods?

Normal: One of the benefits of taking birth control pills (BCPs) is that they make your menses lighter and less painful. That's one of the indications for using them. I would expect your period to feel different. Irregular bleeding on BCPs is also very common, especially for the first 3 months. Your body is still getting used to the hormones.