Breast biopsy - results tomorrow evening and panicking

Hi all,

I get the results of my breast biopsy tomorrow and getting in a terrible state. 

I was doing a breast trial and had an enhanced mammogram that showed a 3cm mass. I went for a biopsy a few weeks ago but they took tissue from the wrong area. Had another, this time in the mammogram machine which I can only compare to some sort of medieval torture as the local anaesthetic didn't work and it was very painful for about half an hour. A very nice nurse reassured me afterwards and explained that it could be one of two things, cancer or schlerosing lesion.

I've always been the anxious type but since then I have been having panic attacks, crying all the time and really thinking the worst. I'm currently working from home and not back into the office (due to lockdown) until Thursday but didn't do much work today at all. I just sat on the computer googling everything and getting in a worse state. I even called my doctor to see if there was anything I could do to stop the panic attacks but all he could offer was diazepam but I didn't really want to go down that route as already on anti-anxiety meds since my daughter died last year. I seem to be overreacting over everything right now and feel like a horrible person. Is this normal?