Sudden stammer with French oral exam next week!!

Sudden stammer with French oral exam next week!! Hey guys so a bit of background - i have had to go back on my old ADHD meds because of a national shortage, which has given me a sort of stammer/stutter, I've had it before but not nearly as bad. I am in my final year of school and exam season is starting, so I think the stress has been a big factor (my dad has a stammer and said his started around my age too). I have got my French speaking exam on wednesday, and am really struggling to get my words out, it's hard enough to speak in english without stammering but in french it's 10 times worse. So im wondering if anyone has any last minute advice or tips to help me? Thanks.