@FiFiK have you considered debriefing with your GP?
My wise GP recommended I check in with him a few days after my appointment with the surgeon and before my first appointment with my oncologist, just in case I had questions.
I found it helped me get a more realistic grasp of what I had been told and I was a bit more prepared for my meeting with the oncologist.
Otherwise, I agree with all the comments made above! @cranky_granny mentioned a breast care nurse - my surgeon asked me if I wished her to refer me to a breast care nurse. Might you consider contacting the surgeon’s receptionist to organise such a referral? The nurse I had was very responsive and flexible and we did phone call consults.
Wishing you the best - what you’re experiencing is very understandable and familiar.