Lied to best friend about birth story....would you be mad?

OK so I had my 4th baby 4 months ago and my best friend since high school, at the time of my birth was (and still is) pregnant with her first baby. My birth was the worst of all 4, I had a lot of complications, then my spinal didn't work well enough and I felt the surgery starting, and at one point I thought I might not survive and thought I was dying. I was traumatized and had nightmares for awhile and still get shaken and cry when I think about it.

Thing is, my friend tends to worry a lot, especially about medical procedures. She's been nervous about giving birth since we've discussed it the last 20 years! So when she's asked me about my birth, I've lied through my teeth and told her that everything went fine. I do tell her that I had a c section and that's it. It was out of love, of not wanting to scare her before she's even given birth. She looks to me saying if I did it 4x and I'm okay, then she can do it. Even though it sucked not having my friend to turn to through my trauma, it was more important to me for her to have a peaceful pregnancy and birth without causing her additional worry.

Now she's due next week, and I've always intended to tell her what really happened after the birth when she no longer worries (she's not planning on any more pregnancies after this, I'm 38 and she's 39) but I'm nervous she is going to be upset that I basically lied to her.

What would you do? How would you feel if you were her?