Concerned about brain tumour

Hello all,

I am not sure if this the right place to post as I am aware so many people on this thread are going through incredibly tough times but I didn't know where else to post my thoughts so I really hope my post is not perceived negatively.

I am 22 year old female and have symptoms such as very very brief after images after looking at a stimulus and ghosting image when my eyes are out of focus or when looking at subtitles on TV for example, against a dark background. This ghosting goes away when I shift my focus back on the subtitles or blink my eyes. But I have had these symptoms since I was 17 and have never thought much of it until it struck me these could be signs of a brain tumour.

I am someone with anxiety so going to the doctors is an incredibly anxious process for me which I try to avoid as much as possible but now it seems like I must go to the doctors to see what it wrong. I have been losing sleep over this and am not sure who to speak to as I don't wish to discuss this with friends or family. I suppose I am just looking to get any information/advice towards what I am experiencing.

Please do let me know if this post is not appropriate but I am just lost with anxiety. 
 

thank you