Secondary infertility. Anti bodies?

I seem to get pregnant easily, but lose the pregnancy just as easily. I am a 24 year old woman. I first got pregnant at 19, and lost it at 9 weeks. I then got pregnant 4 months later, at 20years old, my body went into early labour at 28 weeks, and I gave birth at 31 weeks gestation (luckily he is now happy and healthy. Following his birth, I got pregnant again, 4 months later , I Had an abortion at 7 weeks, I then got pregnant 2 more times, but lost them both at 5 weeks gestation. In June 2016, I got pregnant again, I had an abortion at 6 weeks, then the month after that I was pregnant again. I had another abortion at 6 weeks. (Although I was already bleeding anyway) Me and my partner are now trying for another baby, however I have been pregnant a further 3 times, and have miscarryed all, from around 4-6 weeks. I was told at my first abortion consultation that i have negative blood. But my midwife said I was positive. Have I created anti bodies?