Formula feeding-feeling guilty

Torri • Hi! I`m Torri! I have 2 beautiful girls. 3 yrs old and 7 months old. Planning on one more in the next 2 years.
So my daughter has been formula fed since she was born.. The reasons for not breastfeeding aren't important here.. She is 10 days old now and my breasts still leak and I'm feeling guilty off and on every single day for not breastfeeding her :( is it too late to try breastfeeding or is my supply totally gone? 
Also, is anyone else feeling guilty for formula feeding?
Side note: she sleeps amazing and is a very happy baby..