Breastfeed and formula?!

Marie • EDD July 11th, 2018! Our second little munchkin . Miracle from God 😘
I did everything I can to increase my milk production and its really not enough for my little one. It takes me now 2hours minimum for each breastfeed and he eats like 12 times a day. I'm seing a doctor specialize in breastfeeding and give me a blend of all those herbs in drops and as well meds to increase my milk supply. Its been 4 days and nothibg much more.. im very sad to see my little one frustrating try to get milk of my breast. So I want to look the option to do a combo of bf and formula. Is that possible? Is he going to refuse my breast?