Tonight is the night!! Don't be afraid. We're all thinking of you - Everyone here has been through it, and made it out the other side... It can actually be pretty liberating for some!
Perhaps you could turn the haircut into an experience for your little one, by letting them know it was going to happen in advance or even helping them cut mummy's hair. A morning surprise might be more upsetting than knowing in advance? There's also the "Shave for a cure" type stuff, could you possibly explain that it was for that as well?? :)
If you need help with hair or headwear, please let me know - I am based in Perth too and can accomodate after hours or whenever you need, you can direct message me any questions you might have or if you need tips on looking after anything you are wearing or currently own! Always more than thrilled to lend a hand where we can :)