history: I have a meeting with my boss in a couple of hours. I have no idea what it's about, so I'm kind of nervous. I have a meeting with my boss in a few hours... The way you wrote that makes it seem like you're anticipating something bad... Do you mind if I ask what you're expecting to happen?
current: See, that's the thing... I have no idea what to expect. That's why I'm so nervous about it.
next: Interesting... well then at least that leaves the possibility for something good instead. If you're not sure what it could be, then at least it's not some obvious mistake or negligence on your part. I hope for the best for you