Is this anxiety?

Hello, i'm new here and don't really know if this is the right place to post it but here it goes.

About a month ago i started feeling somewhat bad with general feelings of choking and what not. My doctor said it was gerd gave me something against it and it was mostly fine.

From that point on however it started something that has lasted till now. Me believing that I have every type of cancer there is. Most of the fears went away but one hasn't. My constant fear of me having a brain tumor.

I don't know anymore. I've had some troubles with my vision for the past 3 weeks or so. Started with ocasional blurryness which went away after a while. The it went to me just feeling like my eyes are heavy and that i'm constantly tired. Which now, again, changed to my eyes feeling sometimes tired and other times either fine or just a little blurry/like i have a white haze in front of me for a few seconds which mostly get's away when i blink a few times.

Apart from that my left ear feels full. I mean, every time i swallow both of my ears make this static/crackling sound which is more noticeable in the left ear.

And the one thing that is really getting to me is my memory. I've always been known to have really good memory. Now, for about a  week and a half I feel like i forget things i did around 2-3 days ago. Right now i can somewhat remember everything up until last thursday with me being able to tell exactly what happened today. But as soon as i go to bed and sleep the next morning is me again, going over everything that happened in the last 4-5 days with me barely being able to remember what i did for example yesterday from 7-10pm.  On the other hand I have no problems remembering things that happened before that one and a half week time period.  

Also i feel as if (this happens sometimes. Some days it's more noticeable than others) as if wherever i go i'm not there mentally. Like, i have this weird brain fog that is just there. For example just went somewhere for 1 hour but that hour felt 1. really short (days seem to go by way too fast for me. I end up wondering how i'm already awake for 9 hours when i barely did anything today.)  2. it feels like i'm not there mentally. I talk with people but it feels like i tell my body to do something and then my mind wonders off elsewhere. 

Now, this post might not be the most well versed and i might have not articulated myself very well, but all i'm really asking is that if it is possible for all of this to be caused by anxiety or my fear of brain tumors that makes me imagine all of these symptoms. I had none of them 4 weeks ago when my throat acted up. It mostly started when i started reading about brain tumors. And since then regardless of what anyone tells me i can't seem to stop shaking/being afraid to no end about the possibility of it and me dying.

Is it really possible that this is anxiety/depression ? Severe one at that ?

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