Is what happened—ejaculation after sexual thoughts and bodily numbness without movement—considered masturbation, knowing that it recurred three times?

All praise is due to Allah, who guided you to repentance. We ask Him to grant you steadfastness. As for mere thoughts, without any action, there is no sin in them. However, we advise you to avoid these thoughts and repel them, for they are among Satan's temptations to turn you away from your repentance.