Not silly at all. You sometimes have to wait several days for an appointment. You can always cancel it if you truly do not want to go.
If you continue to think you need help.....the issue keeps coming up in your mind, then go.
Perhaps you are just feeling vulnerable...like you don't want to be hurt (emotionally) anymore.
Therapy has been a great blessing to me. My only regret is that I did not see my need much sooner.
Make the call. Go to the appointment. Don't keep wishing you had.