hello all i am worried about having a brain tumour, i noticed a few days a go that i was thinking about something to do and when i went to do it a kept forgetting on what it was going to do, happened a few times and thought i was getting dementia at 23 and was worried from there and after looking up the symptoms of that i know think i have a brain tumour , i now have a sort of pressure feeling in my forehead/top of forehead thats dull and made worse and more noticeable when laying down and ive had this for the last few days and sometimes comes and goes , and im convinced i have a brain tumour or something seriously wrong.

in the past ive also been worried about that ive had stomach cancer,motor neurone disease,HIV,male breast cancer,lymphoma and a few more