Hi Yvonne. Welcome! Your children are lucky to have a diagnosis so young. You are a good mom. I am sensory defensive myself. I only recently (within the past year) learned exactly what was wrong with me. I, too, discovered SPD by reading a book. My sons grew up with sensory issues. They are grown now and doing pretty well. I can't help wonder what it would have been like for them, and for me, if we had known about SPD while they were growing up.
All this talk about natural childbirth. I delivered natural as well, with a midwife both times. I wouldn't do it any other way. Veeeerrrrryyyy long labor with my first, just a few hours with the second. But I wouldn't consider myself tolerant to pain. I delivered without anesthesia because I felt it would be safer for all concerned. Preparing for deliver, and delivery taught me alot about focus, acceptance and the power of guided meditation. Both times, I had someone talk me through it, it was very helpful.