Hi Tidden, have you tried speaking with your GP, they may be able to prescribe you something to help,you sleep at nights, or help you find someone for counselling. If you are anything like me I seem to deal with anything better after a good night sleep.
i did a short meditation and mindfulness course which helped me immensely for anxiety, as mine was through the roof in the early stages of diagnosis.
I was like you Tidden BC found at a routine mammogram, no lump felt by me or doctors.
Do you have access to a McGrath Foundation Breast Cancer Nurse?
Sending hugs xx