I got multiple ones from doctors who can't seem to do their job properly, as others in this thread.

First one: Had something that I have no idea what's it called in English, but it's basically a toddler illness and once you had it you're immune against it. It's still pretty bad when you have it and this is one of those bad cases.

So I had it and my mom and I went to a doctor. The doctor said I was fine.

The night I had 42℃ fever and my mom called the ambulance. The nice woman that came told me "If you'd have waited until the next day you'd be dead. Maybe even another hour." Only that made me realize how bad my situation was.

The next one was when I "broke" my pinkie finger. There was basically a pretty big chunk of bone broken off and it travelled a bit further up the finger. It happened in school and when I went to a teacher they said "But you're not even crying, can't be that bad!" Thanks for telling me I'm brave, asshole.

So two surgeries it'll be. First one was actually pretty good. second one went as planned as well, but the anaesthesist miscalculated the amount of pain killers I needed. I was screaming so a nice old man came down from two stories above to see if I'm alright. The nurses refused to give me more pain killer, so I basically lay there in excruciating pain until the doctor makes his way to the hospital...

The last two are by my dentist. I'm going to the dentist pretty regularly, at least every half of a year. Never anything.

Then all of a sudden my further most back teeth(upper left, upper right, lower left and lower right) all fouled from within, so she had to basically really fast clean the teeth up and seal them. We had 4 weeks and one tooth each week.

At the 2nd tooth she missed the pain killer injection and it still hurt. I told her that, she missed again. And again. And again. Then she refused to give me any more and I had to have my tooth drilled completely open without any pain killers or anything.

That same dentist didn't found the mesioden(German term, no idea about English), which is basically a tooth growing beneath your most front teeth(and only there). Idk why they grow or so, but my doctor who operated said that they're pretty easy to spot and shouldn't pose a serious risk. But that dentist didn't see it.

The tooth ended up bigger than my biggest tooth and when I went into surgery they later told me they had to cut my upper mouth open from outside and inside which they basically never had to do before, and then cut the tooth up into 3 pieces which they then extracted. My left front tooth still is a bit....insecure and unstable, but hey, at least I kept it.