I think anger & irritability are part of most peoples withdrawal experience - it certainly was of mine.
It helped me to remember that - I tried to rationalise I really had no cause to be that angry at x y or z - it was just my mind and body healing.
when your internal voice tells you you can't do this - that's the time to lean on your support here and anywhere else you have it. Negative Self-Talk: 9 Ways To Silence Your Inner Critic
You can do this - guaranteed
It gets better