I guess i want to say is, your fears are perfectly normal, especailly cos your quite young too.
I was petrifed for labour/birth etc and did consider c-section. Even though birth/labour was the hardest thing ive ever done im so glad i did it. I couldnt imagine the recovery surguery and general allertness of what what going on during a c-section.
During birth and labour your blistfully unaware of wats happening, your body is just doing it, even stiching up etc i was so high on the gas i was in a daze and couldnt have cared less
Do lots of research on c-sections (it is MAJOR surgery) and birth and talk to everyone who will listen .
You are still very early on in your pregnancy and you may change your mind.