I have the lost dream a lot - sometimes it's a nightmare, sometimes it's just confusing/disorientating and others it's just frustrating. Familiar places don't lead to where they're supposed to, streets go elsewhere, doors open into different rooms etc.
I wouldn't worry about it. I think that it's just my subconscious playing, working things out. I try not to read too much into it.
Be kind to yourself.
