Changing PGCE course

Hi, I've recently started a secondary PGCE course but having doubts about it. I've always imagined myself teaching FE (post 16+) and the idea of teaching high school students really doesn't excite me. I was unaware that at my university they offered a post 16+ PGCE, but found out about it today. The FE course literally only started yesterday, whereas my course is 3 weeks in.

Does anyone have any experience of changing courses early on? Why does this feel like an awkward subject to bring up to my mentors? I'm afraid if I bring it up and it doesn't work, it will negatively impact the rest of my secondary PGCE.

Many thanks