Student or Learner
I have browsed on the Internet this question:
Do you remember me yet?
And I have discovered that it is used heavily less than
Do you still remember me?
But, was not yet to be used in questions and negative sentences?
"Yet" is indeed used in interrogative and negative contexts (and a few others). It may help to think of it in these contexts as corresponding to "already" in plain affirmative sentences.
If you want the meaning "still" in a negative or interrogative context, then the word you want is "still" ;). (It doesn't have these restrictions on which environment it can occur in.)