Go to bed on time if you have a doctor’s appointment the next day.
Do not schedule doctor’s appointments before work.
Do not have your annual checkup at the endocrinologist, because a med student will assist with the exam. This will not only be embarrassing, but it will take forever. Go to your regular GYN, a fine man who is friendly and professional and does not teach med students.
That wasn’t a lump so much as a chunk. Calm down. At worst it is a cyst. You do not have breast cancer.