Find ways to keep yourself busy and distracted. Watch some good movies or take some long walks. Continuously emailing is an issue that created problems with your last therapist. It's fine to call once and ask the office if they have openings. They'll call you back IF something opens up but if they didn't get back to you, that isn't personal; they just don't have an opening. To cancel an appointment to somehow punish them for not answering makes no sense. Two weeks between sessions may seem long, but it is a period of time you can handle with some focus on keeping your time constructively occupied; you've managed longer between appointments -- you can do this too. Now you've cancelled your appointment, and the length will be even longer -- kind of shooting yourself in the foot.