have u ever been misdiagnosed

I think about this very often. back in November I went into the ER with pain and vomiting but I knew I was pregnant again because I missed my period already. The doctor told me I had a stomach virus, they refuse to do any blood work or test on me. He played with my stomach and told me I'll be okay. They did a urine test on me and said I wasn't pregnant but I told them what it would say before I even taken it. I never get a positive on a test unless it's blood. On the third of december I will never forget what happened to me. I thought I was having my period finally but I bled really heavy with clots. Even two pads couldn't hold the blood. When I came back from out of town that same day I had blood all on the back of my jeans and it even came through my underwear. I said to myself "thank GOD i didnt have to get out of my truck" My period never came on the 3rd of the month so that was odd. The following week I made an appointment to my doctor office to visit my obgyn and she got a blood test done on the day of my appointment. 3 days later the nurse called me to say I had a miscarriage and was speaking to me about my levels. I think about this everynight because it hurts. When it was happening I didn't know I was miscarrying at all. I thought it was a heavy period because that's all I was getting told. Don't ever let a doctor misdiagnose you..they think because they have white coats they know everything. it irritates me when women tell doctors their problem they turn it around