Both consciousness and "senses" are based on interaction -one thing sensing or being aware of something else on the most basic level. Senses make one aware of the external, but consciousness is sensing both internal and external in more complex ways -including one's state in relation to its environment.
If you are referring to the evolution of life on earth, some creatures do not have a complex consciousness or self-awareness, but do sense certain things and react to those things as a simple self.
Life on earth began within an environment which was already complex, but if there was an initial original evolution of all things, the beginning would have been the most simple state possible -but complex enough to allow for all that now is.
A consciousness requires an arrangement of something -as does self-awareness -and different arrangements allow for different types and levels of such.
A fish is conscious and self-aware, but not in as complex an arrangement as man, for example. Man is conscious and self-aware, but not perfectly self-aware because man is not able to sense and keep track of the exact state of every part of the self, because man's arrangement does not allow for it.
Certain arrangements must be preceded by certain levels of consciousness and self-awareness, and consciousness and self-awareness exist by arrangement.
If the whole of everything is considered to be a self -a self-same thing -then it definitely has complex interaction, complex arrangement -and apparently complex consciousness and self-awareness based on the present arrangement of things and what must have preceded the present arrangement.
I don't know the exact nature of that which originally existed and became what is enough to fully explain that, but it seems apparent to me that a complex consciousness and self-awareness must have existed which was capable of causing the arrangement and subsequent arrangements we call the singularity or Big Bang -which was not some random accident, but an intent to cause an environment and life within it.
That is not denying evolution, but considering what must have evolved first from that which "always" existed.
We see minor selves evolving from an already-complex environment -but it is at least just as likely that an overall self -"I AM THAT I AM" -initially existed/self-evolved which is both life itself and its environment.
To me, at least, it seems absolutely necessary given that which has happened and the state which now exists.