To mix feed or not?

The struggle is real due to he might not been getting enough milk from me. He is a good latcher but frequently cries as I've been having difficulty in positioning him due to my CS operation stitches. We consulted his pedia and she recommended Similac if ever that we will pursue mixed feeding. Thoughts? 😅#advicepls #1stimemom #firstbaby #theasianparentph