It’s about mental health and depression.
Crashing and hitting a wall emotionally. Where someone can spiral in their thoughts and their emotions can make them feel isolated and are heavy to deal with alone.

She needs a miracle to pull her out of this state of mind. Which she expresses “I think I’m losing my mind now” so this person is her support system and probably someone who said they would always be there and brings a level of security in a time of feeling vulnerable.

She says “it’s in my head” which is a reference that she’s stuck in her head and That the emotions aren’t necessarily pointed at anything or anyone but either was she is spinning out of control and losing her mind.

She doesn’t want to be alone and needs her support system, whoever that is and hopes they’re going to show up right now and always in these moments because that’s when it’s most needed. She needs that sense of security from her support system to make all the noise In her head slow down to pull her out the other side.

Which is a struggle we all face and it’s even harder to do alone. People don’t always understand mental health because it’s uncomfortable. Therefore people will often give you space or isolate you further because they perceive you’re in a particular mood. But that only isolates a person further and makes a person feel alone in their struggle and when alone with your thoughts the human mind can become quite toxic and Self create worst case scenarios.

Anyway that’s my interpretation.
Shes emotionally spiralling and this is a moment she needs that person there for her the most and is hoping they show up in this moment to help pull her through as oppose to not showing up, letting her down where she will then be alone in a battle with her mind she feels she’s losing.