I would just keep putting her at the breast, skin to skin contact. If you had an epidural you may have a sleepy baby until it is out of her system. (here is some info on sleepy baby post epidural
The Birth of a Breastfeeding Baby and Mother )
here is some advice from Kelly mom on working with a sleepy baby
http://kellymom.com/ages/newborn/new...sleepy-babies/
It should only get better. I would keep a log of nursing sessions and diapers (wet diapers) and if there is a concern, I would call your dr/ped and talk to them. Formula is not the solution for a sleepy baby, so if that is the only solution you get from them, contact your local La Leche league or an LC. But this should get easier, and with your milk coming in, should only get easier.