[It's impossible not to pinpoint down the meaning there to a specific timeline in that spiral of the past. And there, now there's overwhelming guilt, sickness at herself, at the harsh words she said. She clenches her fists again, but now not at Madoka, but herself.
Everything was wrong.
How much she wishes she could hold Madoka there until she no longer cried, drying her tears, soothing as best she could the girl's fears. But she doesn't deserve to even have a bit of comfort herself now in return. Not when the same Madoka who implored her to save her from contracting was the one Homura just chastised for doing just that. She couldn't have listened to the message in time because it was her who created it in the near future.
Her voice shakes, giving forth the tones of a girl months younger, her watery eyes looking away in shame.]
....Sorry. You...you really don't know at all, Madoka...