Nah, you're just a victim of the "doorway syndrome", which makes you forget everything the moment you cross a doorway. The solution is to write what you need to remember before you cross any doorway. It will also helps you build a reputation as someone who always remembers things.

Look up the Doorway Effect. It's a real thing, and no, you're not losing your marbles.

Or stop smoking weed

and there’s someone whose controlling you whose laughing their head off cancelling your actions

We call it being in the hereafter. Now what in the hell did I come in here after?

If this is new and happens with some frequency, see your doctor. … There are many interpretations and most do not involve dementia. A doctor may be able to explain what is going on. Start with your general doctor.