I'm very sorry!
In the past, we had to hand raise from scratch a foal from about 3 days old because his dam rejected him. You can find threads about what we did on the "Best Of" section of this message board.
I haven't really talked about it here, but this season, we did have to wean one filly at 5wks old because her dam was having issues. Thankfully, both are fine now.
What you have going for you -- big time -- is the age of your foal. You should be able to mix milk pellets and mare / foal feed (about 50/50) and have that in front of her pretty much full time. Teach her to drink milk formula from a bowl and at her age once she's eating the milk pellets (happened immediately for us w/ our 5wk old baby), you can do that just 3x a day at this point... soon just morning and night.
Our filly is now nearly 4mos old and she looks just amazing. You'd never know she was hand raised other than the fact that she is dog like in her attachment to us -- especially my husband. I think, honestly, he has turned one of our nicest ever babies into a large puppy dog.
With milk pellets, mare / foal grain (not complete feed), formula mix and soft hay, your baby should really do just fine and with out a lot of time on your part the way you'd have to do if you were hand raising a younger foal.
Best of luck,
Jill
PS do not try a bottle -- an exercises in frustration and very hard to properly clean. A bowl (not a bucket) like you would feed a dog in will be your most readily accepted and easiest option based on our experience.