I'm sorry, therapy breaks are just awful. Mine is on a break as well. Would your t be open to letting you text or email her during the break? Has she spoken to you about self care and things that might help such as journalling, writing her letters to read on her return,, artwork, crisis planning? Would she be open to giving you something of hers to look after if that might help?

Previous therapists have not let me have contact with them during a break and it was really difficult but I did get through it. What helped me was to write to T everyday and present her with my writings on the first session back after the break. It help me knowing that she was going to read what I'd written.