Dreams involving themes of falling, injury, and the presence of loved ones often reflect deep emotions and psychological states. Here are some interpretations of the elements in your dream:

1. Jumping from a hill: This could symbolize taking a risk or making a significant change in your life. The hill represents a challenge or a decision you've made that feels daunting.
2. Feeling blood run down your head: Blood in dreams often signifies life force, vitality, or emotional turmoil. This could suggest that you are feeling hurt or overwhelmed by a situation in your waking life.
3. Being pulled down and then lifted up: This duality may represent your internal struggle between negative feelings (like despair or hopelessness) and the desire for hope or redemption. It could indicate you are navigating through difficult emotions but are also seeking a way out or a better path.
4. Your mom finding you: The presence of your mother may symbolize care, nurturing, or a longing for support. Her inability to feel you could reflect feelings of isolation or a fear of not being understood by those close to you.
5. The darkness after your mother's grief: This might represent a period of uncertainty or confusion that follows emotional turmoil. It can signify a transition period where you are processing your experiences.

Overall, this dream might suggest that you are grappling with significant emotional challenges and are seeking comfort and understanding. It could be beneficial to explore these feelings in your waking life and consider reaching out to someone you trust for support. Reflecting on what changes or risks you may be facing could also provide clarity.