ASD mom hoping for a daughter

My husband and I decided it is about time for another little one, we have a 3yo son with autism. He was a surprise, and the best we could have ever hoped for, but we are taking steps to lower the risk of our second bundle of joy developing autism. We are also hoping for a little girl. I am obsessively reading every study I can find, and my mind is swimming. I fear I am driving those around me insane with my one track mind and I am hoping to find some people on here I can talk to. My OBGYN appointment is a week and a half away, I have started prenatal vitamins, and even changed my diet to mostly vegetarian (ironically my husband is a butcher.) Needless to say my baby fever is consuming me. Anyone out there who can relate?