Sleep / Night Feeds / Engorgement

My baby doesn’t wake up in the night to feed - I have to wake her up. I’ve been waking her up every 4 hours at night which I know is not recommended, and I feel so guilty about it - I’m just so tired! Anyways, I wake up with my breasts engorged - particularly the left one, and my baby will not eat off of it to give me any relief. I’ve tried expressing milk myself to soften it up, but she still refuses to take it. The other side, she nurses like a champ on. Any advice? Tips? I know I need to wake her an hour earlier each time... maybe that will help?