My character has lost two HP and now shows as Slightly Wounded. I have been flying in hyperspace for days. My ship is not harmed. My HP history only shows when I went up a level and received more HPs. I have no idea why I lost HPs. How do I gain them back? Please help me figure out how I lost the HPs.
You didn't lose HP. When you levelled up, your max HP were increased, however not your current HP. Those are now regenerating normally, which is why you are showing to not having full HP. Give it a few more hours, and your HP bar will be green again and you will be unharmed.