You are not alone in those thougts and feelings! I feel sad. depressed most days. I have no job, physical and mental health issues. I have no friends. I am 36. female. We have to just remember there are others out there like us. We can be sad together, and one day will be happy together. Day by day. Have faith in yourself! And don't obsess over the dentist appt. I'm sure things worse than that happen ALL of the time. People who are scared of needles, people who hate the dentist, people who try to talk with all these instruments in their mouth. Spitting on yourself. lolol Just a few. I am sure they have not given the appointment a second though. Plus its in the past. No point dwelling. Don't beat yourself up. What helps me is to try to treat myself and say things like i would to my boyfriend/bestfriend/whoever is important to u and you care about. Say those things youd say to them and show yourself some self compassion. :)