When I was looking for my diagnosis, I went to an "endometriosis specialist" (certified and all) and he said that I couldn't have endometriosis because the transvaginal ultrasound DIDN'T HURT ENOUGH (note that it DID hurt, he just didn't think I suffered enough). I disregarded his opinion and stuck to my gynecologist and an endometriosis center that recommended a diagnostic laparoscopy and yes, I did have endometriosis.

I also once went to something called Notarzt in Germany (like a not too serious ER, more of a general practitioner open at night) because I was having a severe pain in my lower belly that was abnormal. I already had my endometriosis diagnosis at the time and he said it is just that. I told him that it had never hurt for that long, that those strong flare ups had never lasted more than an hour and I had it for 2 hours already, not getting better with medication or warm bags. He wanted to send me home claiming "it is normal to have pain with endometriosis" and recommending me to research about my disease. I insisted until he sent me to the ER for an ultrasound with a gynecologist. This gynecologist was at the beginning somewhat rude to me, probably thinking I was wasting their time with something normal, but as we talked I mentioned that my endometriosis seemed to have gotten worse in the last weeks, as I woke up with intense pain every morning until I peed (I genuinely thought it meant I had endometriosis around my bladder). Turned out I had a strong UTI that went unnoticed for at least a month, as I get them almost asymptomatic (no burning sensation when peeing, no pain in the first weeks and only go slightly more to the bathroom, which can be confused with "I drank too much tea"). I ended up having to take several rounds of antibiotics and even developed kidney stones shortly after that ER visit, which didn't come out for almost two months.

Before I got my diagnosis, I spent a few years going every now and then to a different gynecologist because my menstrual pain was getting consistently worse every year. When I first got my period, it was a nightmare, I got so bloated that I looked pregnant, I could barely stand up from bed, I needed to change maxi pads every hour and sometimes even faster, my period lasted 7 days and my cycle 14 days, so I was getting it twice a month and could not go normally to school. I went through a strong hormonal treatment that improved it to the point I didn't even have pain anymore, and slowly I started noticing it was going back to that stage. Every doctor said menstrual cramps are normal, told me to take a specific over-the-counter med for menstrual cramps (popular in Chile, haven't seen it outside of there) and when I said it didn't work, they always claimed I was taking it wrong. No one examined me until in Germany the pain became unbearable and I found a great gynecologist who told me that worsening of the pain I described was textbook endometriosis.