How confident are you on passing? If you feel 100% sure you will pass, then maybe you would be able to cope with any pain you might feel as no doubt you want to get it over and done with. My friend was back driving on the school run after 3 days, she said sore but easier than walking the school walk with her kids. If you have any doubt then prob advisable to cancel and do a few weeks later, if this will be easier for you. Sods law you cancel and then are one of those with no pain hehe xx