Don't lower your expectations to meet your performance. Raise your level of performance to meet your expectations. Expect the best of yourself, and then do what is necessary to make it a reality.
Feelings come and feelings go. There is no need to fear them and no need to crave them. Be open to your feelings and experience them while they are here. Then be open to the feelings that will come next. Your feelings are a part of your experience. Yet no mere feeling, however intense it may seem, is your permanent reality.
Expect the best of yourself, and then do what is necessary to make it a reality.