Hi and a very warm welcome to the online community
I'm sorry to hear that you need to have a mastectomy and it's perfectly normal to feel scared at the prospect. Macmillan have produced some excellent information about coping with your emotions (link) which you might like to take a look at when you have a minute.
Could I suggest that you join and post your question in the very friendly breast cancer group as there you'll find people who can share their experiences with you.
To join just click on the link I've created and then choose 'join this group' on the page that opens. You can then introduce yourself and ask questions after selecting 'start a discussion' and join in with existing conversations by clicking on 'reply'.
Sending a supportive ((((hug))))
"Never regret a day in your life, good days give you happiness, bad days give you experience"
