Congratulations on getting vaccinated! My husband and I drove an hour to get the Pfizer vaccine last week. We could have found an appointment closer by but we wanted an appointment asap. Besides a sore arm, he hardly felt anything but I felt so fatigued I took a sick day from work.
My sister has two appointments and as we speak, is waiting for a call to let her know if a last minute appointment is available this afternoon.
Sounds like you had a pretty frustrating time making and canceling appointments. Making appointment cancellations difficult for people will only discourage them from canceling and letting other people get a needed appointment.