Which one would be correct?
(I mean I think some matter all the time, It makes my mind busy)

I can't think of anyhing else.
I can't think about anyhing else.

Question

Which one would be correct?
(I mean I think some matter all the time, It makes my mind busy)

I can't think of anyhing else.
I can't think about anyhing else.

Answer

"I can't think about anything else" would be the right option.

That means that you can't stop thinking about someone or something.