Get him to the breast as much as you possibly can (if you can do every 2 hours, that would be fab!) and pump on top. Yes, it's a hard slog, but it will be worth it (and always give a BF before any FF - also, if you offer any FF, do it during the daytime and not evening/night as your prolactin levels are higher during the hours of darkness so any FFs will have less of an impact on supply if given during the day).