I feel the same as you, I don't want to intrude her as this is her off time, and she doesn't have any responsibility in attending to me, I feel that way even if she have said time after time that I shouldn't hesitate to contact her even during holidays. I still don't feel at all comfortable doing so, but I'm sure for your T, especially when she said it's ok to contact her, I'm sure she will be more than happy to help.

This Christmas break my T reminded me again that I should email her if I need to talk, and we can have a brief conversation over the phone. Christmas is generally a very difficult time for me and she knows that as she's been might T for some years. Each year she have said pretty much the same thing about contacting her, but I never did, even if I struggled. So this year she decided she is going to take the lead, and actually scheduled a telephone check-in with me tomorrow. I'm not sure how much it actually helps having a check-in with her, I'll know tomorrow.