Tamara, welcome! The herbs fenugreek and blessed thistle are both milk makers. Fenugreek being the primary. This is the dosage Fenugreek 500-700mg 3 caps 3x a day Blessed Thistle 300-400mg 3 caps 3x a day
Asa for formula, I don't know. I used Good Start with my DD 7 years ago. Things have changed and there are so many more choices now. I would probably personally go for an organic formula. But really my first choice would be to find donor milk. Nona here runs a program matching mother to mother. It isn't suggested to make your own formula, to difficult to get the nutrition down.