yeah i sometimes have this, i think i could give an explanation based from theory...

well when i try to WILD i get a very strange dizzy sensation, and once, i broke off from it and bolted upright in bed, now thats what i called dizzy, couldnt think or see straight, like my head was fileld with water and was being drained out.
Another explanation could be a simple headrush, when you stand up quickly you get one and cant walk around straight for a few minutes.

As for not recognising dreamsigns, i was being chased by a cyborg in NYC and i didnt notice anything strange. Sometimes you notice it, sometimes you dont. its just like that

Tell us if anything else happens, or if this happens again yah?