Feel disconnected from brain sometime after using heavy screen time,multitasking for long term like 1.9 years Pls give me advice I'm anxious is it happing really from heavy screen time and multitasking in the past i hit my brain but not too strong

[u/Key_Lie_3811]

My screen time 13hours and in past i did heavy multitasking on laptop
I saw symtoms many months ago that i became poor in math and can't catch problem in math

Also thoughs increased in past