I am all out of spells, I have barely any life left for all my characters, when I try to go to camp the game just stops in conversation mode with Shadowheart saying she feels weird... darkness protect me...

And why doesn't Haslin follow me to camp to rest as well?

Did you try to go to camp through the map waypoint system instead of the camp button?

Never mind, I just started pushing keys on keyboard and the text options popped up.

Yep, there are a couple lock up areas like this in conversation. Pressing the space bar gets you through.