Welcome!
The first thing I want to comment on is your birth trauma. I feel a bit shy to send a hug to someone I've only just met, but I want to! It happens more than you might think that women carry guilt and PTSD round with them for many years after a birth. I hope the birth of your younger son was somewhat healing, but it might be that you'd benefit from some help for yourself around this. I don't know what there is where you are - in the UK there is for example
http://www.birthtraumaassociation.org.uk/ and
http://www.sheilakitzinger.com/BirthCrisis.htm . You might find the list of research papers on the first site helpful, perhaps.
I am not a neurologist, but your son's 2e issues really don't sound like perinatal brain injury to me, which is what they'd have to be for the birth to be the explanation. Who told you they might be associated with the birth, and on what basis? I'm suspicious of this. Perhaps more biologically plausible might be that they might have been caused by the pre-eclampsia; we now know that PE reflects a fundamental change in the joint physiology of the mother and child, beginning in the first trimester. I've never heard that there is any such relationship, though.
I don't know about your case specifically, of course, but pre-eclampsia can worsen very fast and can be very serious if that happens. Often women are induced without adequate evidence that they really have pre-eclampsia (e.g., induced solely because of slightly raised blood pressure) but it does happen that induction is really evidence-based even though the woman feels fairly normal. There have been enormous advances in the understanding of pre-eclampsia in recent years, so a lot more is known now than anyone could have known when you gave birth to your DS10. If you are the type of person to find more knowledge helpful, you might want to look into this [but watch out for crazy pseudoscience like the Brewer diet sites!]
Have you already got the book
http://www.amazon.com/Misdiagnosis-Diagnoses-Gifted-Children-Adults/dp/0910707677/? You might well find it useful, if not.
