There you go! If you deprive your mind of quality rest/sleep, the next day you’re neuronal networks in your speech motor system gets all fkd up and doesn’t fire properly. Try drinking a good calming herbal tea before bed, like Lemon Balm or Chamomile tea, 1 hour before bed. Do not drink green tea as it contains caffeine. Try to minimise sugary crap too. Start your day with the 4-7-8 box breathing technique too (4X).