What can I do if I was misdiagnosed and had lab errors during pregnancy?

I found out I was pregnant 1-13-2009 via home pregnancy test. About 2 days later I was feeling a crampy and went to the local ER. Upon having blood work and an ultrasound done, the ER Dr. came in and told my husband and I that I had an ectopic pregnancy and would need surgery to remove the fetus. After removing my tube and ovary, I awakened from my surgery and my husband informed me that the surgeon explained to him that I was still pregnant and that the initial diagnosis of an ectopic pregnancy was wrong. A nurse came into my room and tried to help me to the bathroom when I got a severe pain in the lower side of my abdomen...I was returned to the OR for a second time to repair a(n) muscle hematoma. This time I was not put under anymore anesthesia and was only given local injections to my abdomen while I was WIDE AWAKE! I was traumatized. About 3-5 days later at a follow up visit to the local OBGYN he sent me for more blood work (at the same hospital) He called me later at my home and told me that my hcg levels had dropped and I was probably miscarrying. He gave me his home phone number and told me to call him over the weekend if I had started to bleed. For 3 days I was a mess..thinking I was miscarrying the whole time. On Monday the Dr. called me at my home again and asked if I had started to bleed at which point I said no. He asked me return the following day to the hospital lab for another round of blood work after which he called me and stated that the hcg levels were normal and that the previous tests were probably and error. My pregnancy was considered high risk because of the anesthesia that was used during my initial operation and I had numerous Dr appointments at a high risk clinic to check for fetal heart defects because of the anesthesia. I had major anxiety to the point that I didn’t even want to get out of bed to go to work. My son was born and I went to the Dr. about getting anxiety medication.