Lawsuit against OBGYN?

I believe that my OBGYN may have caused mistakes with both of my pregnancies. I was Strep B + with my first child. I was a week and a half over my due date and she broke my water and I went into labor, I then had to have a C section. 2 weeks after being home from the hospital my child had a high fever and was really fussy and his body was limp..we brought him to the hospital and they couldn't get an IV in him so after an hour they had him rushed in an ambulance to a different hospital. They did a spinal tap and found out he had caught Spinal Bacterial Meningities infecting his blood, brain, and spine he had 4 frontal lobe strokes in his brain as well as a seizure from the Group Strep B they found positive in me during pregnancy. This poor child went through SO much and we almost lost him. There was a low percentage that he would survive, and he did. The doctor was sure that he was going to be deaf and spoke with us about the Cerebral Palsy along with many other things. There was a paster up in his room everyday he was there. He is now 21/2 years old but could have developmental problems. Although He recovered VERY well and is like any other 2 1/2 year old. A true MIRACLE. He has some speech problems, but we continue to work with him. He was hospitalized for over a month. Everyone tells me that could be a huge lawsuit, I believe I was supposed to recieve antibiotics during labor, but I had a C-Section... ....Getting to my second pregnancy.... I was supposed to recieve the Rhogam shot because I am O- and my husband is A+ I did recieve it with my first child his blood type is positive as well as my second child now, but while pregnant with my second child I did not recieve it. We are now questioning whether or not it's safe to have another child. Is this the same Doctors fault? Could there be a lawsuit?