Combo feeding

Is anyone else combo feeding? I recently started my almost 2 month old, after exclusively pumping breastmilk but i decided to combo feed to take some stress off myself because my milk supply is so up and down every few weeks it’s frustrating, i used to feel bad and like a bad mom and i felt like the body that created and held my baby for so long, was failing her… But now im realizing fed is best ! and i shouldn’t feel bad for having to do both, formula isint bad and my baby is still getting more breastmilk then she is formula, she mainly gets formula at night so my breasts could build its supply over night and in the morning and during the dday ill pump and have enough for bottles. any other moms doing the same? maybe not for the same reasons but just to understand?