I can understand how difficult it is cognitively to reply with quotes on a phone. Do you have a laptop or desk top you can use?

The cognitive effort between my tablet, laptop and desk top is drastic. Does your phone have a mini- qwerty key board? Or qwerty touch screen? or number/letter pad?

Just because you think you are successful at using your phone to text does not mean it does not stress/strain your brain.

The fact that it only displays a small amount of text means you need to use more memory skills to remember what has been typed but is off screen.

I can text on my phone with the number pad but it overwhelms me with the memory demands.

One issue I think you should look into is whether you are getting good oxygen when you sleep.

Where do you sleep ?
Where do you take a nap?
What positions do you sleep in?
Do you snore?
Do you notice any correlation between stressful or bad dreams and having a bad day?
Are there times when you wake up and feel alert?
Are there other times when you wake up wondering when, where, and who you are?

How long have you been out of the workforce versus in the workforce since you turned 21 years old? Did you work under the table so work does not show up with SSA?