Is this a sign something is seriously wrong?

Sometimes I feel like I can't think properly, for example, I read. When I read head aches I feel like I cant pronounce words in my head. Like slurred speech only its in the head.

It creates a mild pressure in my ears and back of nose and palet.

It doesn't just happen when I have anxiety or depression.

I been using nasal spray for sinus issues which I been getting for 6 months to releive sinus inflamation and drain fluid from my ears and releive the pressure. It doesn't work, my ears does click, amd still the same, I can breathe ok, although it feels like something behind my nose and I just cant think properly sometimes.

Is this brain fog?

All these feelings are just mild.

I been thinking I have some tumor in my brain or something because my arms and leg feels tired and I'm always fatigued, but doc. says my arms are fine during physical examination. Blood tests were normal.

I been like this for 2 years now!

I'm unsure if this is all anxiety and it's hard to ignore it.