It happened for me again and I can tell you that usually i don`t wake up as you would first think... I know when I wake up because no matter the hour I go to the bathroom(It can even happen after 1 hour of sleep).

So, today I realised I had 2 dreams because of a thing that appeared in both my dreams(I think it was some kind of basement). The first dream had almost just that, and a street(a country street, grass and everything)
and the second one was actually a street meeting(a city street) and people from 2 regions had to make traditional exchange . This happened near a corner of a street. And at a certain moment I could see beneath the street(for no reason) and I saw that basement again... and I think that at that point I woke up(it was 5:15 AM). After that I haven`t recalled the dream(if it was) between 5:15-6:00 AM when I left for school .

And... suspiciosly later that day I realised that I had another dream(that previously I didn`t remember). It was some kind of castle and... I don`t know about this but that basement might have been involved somehow but it`s unclear now .

I have to say that I remember clearly a dream(about some years back) when I was passing near a huge egg... and I was saying like->this is "that" egg I saw earlyer . I actually had 2 dreams but recalled only one with a deja-vu feeling .

How I can say it was only one sleep and I didn`t woke up ? well I might say that I know when I wake up but... usually dreams from one day to another don`t have any kind of connection between them so... I`d guess that theyre very near to each-other like consecutive . I remember the so called overwriting of the dreams which... I think It`s not totally true. As well I think that we might remember what we want to remember .