This should probably be in Help or Sleep and Health. Help tends to take a while to get responses coz of the administration though.

But anyway. These things happen occasionally to everyone. Especially after just waking up.
It's only a problem if it happens often and causes you stress.

Does this happen often, or only the times you mentioned? Often meaning a few times a week or a few times a day.

Are you stressed? Or more stressed than usual? Maybe tired as well?

If it's only the occasional thing, don't worry about it. It may pass as you get older.
I used to hear voices too some times and beeping machine sort of noises. Usually when tired and stressed but sometimes when nothing was out of the ordinary.

Although your examples do seem fairly pronounced. I only heard things when it was quiet or constant noises were happening like in the shower with the running water noise or when everyone was asleep in the house and it was quiet.

The fact that you didn't realise these things were hallucinations may be an indicator that something is off. Like when I heard those machine beeping sort of noises I still had a feeling they were in my head, even though they sounded real. But you don't seem to recognise that they are hallucinations. At least not until your dad told you and after rewinding the podcast.

Keep an eye on it, but don't worry. It will most likely pass. I suggest writing these things down so you don't dwell on it, whether it's here or in a diary or whatever. This should help you to forget about it for a while, while keeping note of how often this happens.