Perhaps a slightly different view which may help....
I too had a hard time dealing with stalls. I knew exactly why we did them, understood all the techniques etc but found it difficult and hated doing them.
I made my mind up a week or so before my skills test that having gone through various hoops to be in the position of being ready for the skills test, all written exams passed and QXC done I was not going to let the stall exercise fail me. Two days before my planned test I went out with my instructor and asked him to put me under test conditions and get me performing the stalls as I would in my test. This helped me enormously as it all went well although it wasnt a happy lesson!
I'll be honest that I was still very wary about stalling just before the test but reasoned that I would have a very experienced person sat next to me so if things did go really wrong he would help recover us anyway.
I did the nav exercise first then near my home airfield was asked to do the instrument flying then set up for a stall, because I'd already had feedback that the previous bits had gone well there was no way I was going to let the stalls cause me problem and I managed to execute them confidently, if I'm honest probably for the first time! I wasn't tired despite having flown for over an hour already, I actually felt energised, adrenaline I guess and a good examiner who was reassuring in his manner.
I agree with an earlier comment that talking through helped but above all you can fly so go and prove it, safely.
Good luck.
Mac