It's normal for some workouts to feel more challenging than others.
If a workout feels too difficult:
Slow down and take breaks when needed.
Reduce your range of motion.
Use lighter weights or no equipment.
Skip an exercise that doesn't feel right and choose a suitable alternative.
Repeat an earlier workout if it better matches your current fitness level.
Your workouts should feel appropriately challenging, but they should never cause pain. Listen to your body and adjust the workout to a level that feels right for you.