i had both procedures a couple of yrs ago.
they give you versed which puts you in a twilight sleep. you'll never feel a thing. i was totally unaware of anything. then you wake up fully alert and it's over.

the prep was also the worst. you have to drink a bottle of the stuff and there's something else either before or after. and, it starts early. i believe you can have clear liquids but my memory fades on that.

you'll be glad you have that extra time in the morning. you'll need it to complete the prep. try to grab rest when you can in between. and stay hydrated.

i don't know anything about your meds, sorry.
you'll come thru this fine.

it will be a big relief when it's over.
hang tough. you'll be fine.
let us know how it's going.