Bleeding in between periods??

Taylor • 06/09/2018💍 09/21/18👦🏼💙 02/03/21👶🏼💕

I’m 4 months postpartum and my dr started me on the combination pill Taytulla. I started that on the 18th of January and that was also the first day of my first period. It’s been almost 3 weeks since starting it. I got a little tipsy with my husband this weekend and I missed the pill by 3 hours but took it when I got in bed. We had unprotected sex and he finished in me. I wake up this morning and I’m spotting a lot. Is this part of the pill or is it my periods trying to be normal again??