"Horrible experience "

My GP doctor recently referred me to the cardiology to get an echocardiogram. I had the appointment yesterday. However, this experience was horrible. The appointment was extremely painful for me. I was even shaking with pain and getting lightheaded. I even started to cry from the pain of the probe digging into my chest. I have googled whether it is normal to be left bruised after an echocardiogram, however Google has told me that it is in fact not normal to be left with a bruise. My whole left chest aches and the bruise just keeps getting darker and more tender to the touch. I’m not sure whether I am just extremely sensitive to pain, I never used to be. But at the end of the day, I don’t believe any professional should be leaving bruises on my body, especially at the hospital. I also felt that the doctor/nurse could have been more understanding, when she noticed I had started to cry, and given me a moment to collect myself instead of continuing and causing me more pain. Maybe I should have spoken up, but it was just me in that appointment with her and I’m also still quite young and only recently have started to go into my appointments alone. I have had family suggest making a formal complaint, but I don’t wish to go through all the drama of doing so.