There is about 1-1/2% chance of a perforation occurring during initial insertion, which you were probably informed of and offered a waiver to sign or refuse.
Sounds like you were one of the small percentages. Been there with a bad reaction to an oral medication which is rated at 1/2%.

Don't blame you for being worried. Old saying, each case is different. I'd ask them if there is a specific difference in your case suggesting a specific approach.

Trust it will all work out for you.