Looking for support

I had my little boy on 02/11/17 after a long terrible labor I ended up having a C section. I was in alot of pain and very out of it from all the medication. I decided to formula feed and a few weeks later ultimately regretted my decision and was able to start breastfeeding as my milk never dried up. Month's later I find myself beating myself up mentally and feeling guilty that my baby boy didnt recieve any of my first milk aka colostrum. Im trying to stay positive that hes been getting breastmilk but I just can't let it go and forgive myself for formula feeding at the beginning.