Hello, I'm a first time user of this site...
Sorry if there is already a previous question like this.

Previously in rare occasions, I hallucinate a crawling insect in the corner of my eye. When I turn to see it, its nothing.
Once, I was lying down. When I looked up at the wall, there was one "little white maggot" on the wall and it was slowly crawling across. I got up and had a closer look, but found out it was just a white "blob" on the wall. So I went back lying down, but it still was slowly moving.. regardless of checking if it was real a couple of times.

This happened in really rare occasions so I didn't think to go and check up. This happened previously,(in my teens) and doesn't happen anymore.

Can you please diagnose this?
And share you opinion?

Thank you, much appreciated! :)

It's probably nothing to worry about. Just your eyes sensing movement where there is none. If you were seeing a maggot moving and there were no white blob at all, it'd probably be a bigger issue.
All the same... hope it's nothing serious... because it happens to me a lot too... and with things much bigger than insects. :P

Thanks KalFour :)