BG1 right? You get a healer (Jaheira - Druid) at the Friendly Arm Inn, the first place you are meant to visit. I always get her partner killed off because hes useless.
You should really try to get to the Friendly Arm as directly as possible, you're quite weak with just you and Imoen wandering around the wilderness. There's another good character to be picked up just north of the Inn zone too.