but I have a fear of impending doom that I'm going to be highly criticised.. Or worst they will say they don't feel that I am good enough to achieve the PhD
Being "highly criticised" does not mean you're a failure. Think about it as scholarly rigour & scrutiny of the work - not you. Try not to take it as a judgement of your character.
It's how research & scholarship works: our ideas, results, conclusions etc need to be subjected to scrutiny. The ideas/assertions/statements/conclusions which resist critique & scrutiny most robustly are generally the conclusions which best describe or explain the phenomenon you're investigating, at this point in time, with the data you have (I'm resisting saying "truth").
Do some professional self-reflection: not "I am a bad person." but "why do I have a sense of impending doom?" If it's exhaustion (a PhD is just hard hard work, mentally & physically), take a break. A day off won't hurt. If your feeling of doom is in the work itself -
that is really a good thing!
It means that you are developing the required self-reflective professional knowledge & approach to be able to make a disinterested assessment of your own work. This is what a PhD trains you for, as you'll need to be able to assess the quality of your own work after the PhD - and indeed, supervise others in their PhDs.
You are probably exhausted, and have lost any sense of being in control. This happens particularly towards the end of the PhD. Your OP reads as a quite infantilised out-of-control state. Do what you need o do to take back control of your own work.
Research is tough, mentally & physically. But if you've got this far, you can cope. You will cope. Sleep, rest, exercise, do something else (I found that playing a musical instrument helped me immensely - something that engaged my brain & body in a different way, and I had to be in the moment).