Don't feel stupid (easier said that done though, right?). We all do the best we can for our bubs with what we've got and what we know at the time.
I have heard of people starting to bf or express a while after babies have been born, but haven't had any first hand experience - but I'm sure the ABA would be able to give you information and assistance with it :D
or theres some lactation specialists who are on BB who could probably steer you in the right direction as well.
Good luck!! And if it doesn't work out, don't beat yourself up about it. You're still doing the best you can for your baby :hug: