Please don't beat yourself up or be hard on yourself. Consider this a learning experience, rather than a mistake. There's soooo much to learn, manage and adapt to...not to mention how hard all of this is on the caregiver.
I am, or was...a personal, in-home caregiver, until my DX and surgery. To now watch my significant other/caregiver, as he tries relentlessly to do everything 'right'...I remind him daily...there really is no right or wrong. We're in this journey together, a first for BOTH of us. I do very much worry about how this effects him. The struggle is real!
Take deep breaths and five yourself a gentle, loving pat on the back, hun. You're doing an AMAZING thing...a gift of purest LOVE! (((HUGS)))