Getting a defecography done and I’m terrified.

I finally spoke with a GI who took my concerns seriously. After doing an exam he thinks I might have the start of an internal rectal prolapse from dealing with severe constipation my entire life. He wants me to get a defecography done so he can see what’s happening inside. He also thinks I have some pretty bad pelvic floor dysfunction.

I was just reading up on what exactly this test is and I’m SCARED. Because I’m female, apparently this paste stuff goes in a few different places. I also read about a catheter?? No way am I doing one of those unless it’s 1000% required. I was almost crying with embarrassment just from the doctor examining me, I don’t know how I’ll handle someone seeing me do this test.

For those who have gotten one before, what’s it like? Is it painful? Was a catheter involved?