I felt exactly the same as you, as a single parent and with little family, it was a HUGE fear. Stick this with a personal fear of anaesthetic and it was just awful.
It took me over 7 years to finally book and go ahead - those fears stopping me for so long. I got to the point just before the surgery where I was 24 stone, took my son on holiday as we always do and struggled to do so much. Climbing the Colosseum in Rome was the final straw, as I huffed and puffed to the top almost keeling over, as we went to the pool at our hotel when we stayed at Lake Garda and I wouldn't even dare to get into a costume to swim. It really hit me just how much I've missed out on with him, and how much it has been affecting me.
I didn't want him to be bullied because of me when he went to senior school, and so much of this was a motivation for taking that step despite my fears.
3 days before my surgery, I had my will drawn up. The night before and even the morning of surgery while I was waiting to go down I wrote my son letters in case I didn't make it.
Since my surgery, I've lost 7 stones. I hit the gym, I've started running and I go swimming with my son, something I've avoided for so many years. it has changed my life immensely - it has changed our lives immensely.
I wont say "it will be ok" or "you will be fine" as those words are such a waste of time when you have those fears. People told me that and it used to really annoy me, because of the genuine fears that I had.
But yes, I am ok. And yes I was fine, and knowing that I am doesn't actually take those fears away should I have to have more surgery or do anything else. My fears stopped me for 7 years, but I so wish I had done this earlier.
The consultant said to me when I told him of my fears of dying that if I didn't do something about my weight I'd be dead anyway. I chose my surgeon and provider carefully and found one that had a zero % mortality rate. May sound extreme to some, but thats what I needed as a back up for me and those fears.
you're not alone for certain!