Something more serious or just anxiety?

[Riddle]

I'm not the best at communicating so apologies if this is wordy or something, but I'm trying my best to make some sense.

I was in another town (hadn't been there before) with my best friend. I lost the ability to tell if everything was real or not. I could tell that I was sitting on something but couldn't convince myself it was a stone step. I could hear traffic but I was sure that it was being piped in from somewhere else. I wasn't able to trust anything I could see. I could acknowledge my friend's presence, as in I could see, hear and smell him, but it's like he wasn't there at all.
In trying to calm me down, he kept telling me that it was just my anxiety acting up since I had never been there before and I can be pretty bad in new places. Is it likely? I have thoughts like this (see below) but I have no way of describing them and I can't find a label to stick on them so that people (friend & doctor) know what I'm trying to say.

When I say I have thoughts like these, it would be things like that my food is poisoned, someone is listening in on my thoughts (only vaguely, they can't tell word for word what I'm thinking), everyone around me is openly judging me (although that's more likely to be the anxiety).

Sorry for asking, but I'm between GPs (and psychiatrists) at the moment and while I did tell my old GP some of what I thought, I'd rather be more honest with my new one.
So please help.

Thanks and sorry for the essay.

[Riddle]

I forgot to mention, the main problems I'm being treated for are depression, SH, anxiety (ignored completely by both docs) and suicical ideations (ignored for the most part by them).

I would have told my (former) GP everything except that she pretty much brushed me off when I started telling her about thinking that my food had been poisoned and I had thought the world wasn't real. I'm not a great patient, but I did try and tell her.

[Stellata]

Anxiety can be pretty serious. Feelings of deep insecurity can lead into thoughts and feelings that verge on paranoia. Dissociation can also be a facet of anxiety.

[fuzzy_sweets]

That sounds really scary hun. I hope you feel you can open up to your new GP. Sometimes you have to 'shop around' til you find one who takes you seriously I am afraid.
May i ask how did you cope when you felt like this with your friend?