If you feel like you can think clearly and are questioning if you are dreaming but are unsure, you are not.
All methods of lucid dreaming aim at making you think clearly and question if you are in a dream. With that thought, it should be quite obvious to confirm you are in fact in a dream. Dreams are really not that good, sleeping is just kinda like a heavy suspension of disbelief.
If you feel like you can think clearly and are questioning if you are dreaming but are unsure, you are not.
All methods of lucid dreaming aim at making you think clearly and question if you are in a dream. With that thought, it should be quite obvious to confirm you are in fact in a dream. Dreams are really not that good, sleeping is just kinda like a heavy suspension of disbelief.