It seems to me that you can do everything by the book and avoid lots of things during pregnancy and breastfeeding, and like Ambah, still have a child with allergies.
I actually did eat plenty of peanuts during my pg with Aidyn though

But I understand what you are saying... especially when the research doesn't appear to be very clear or definitive, there is no need to unnecessarily worry.
Although in my case, yes guilt does come into it... because had I been aware that there were risks associated with eating peanuts (although they are controversial) and had I chosen to abstain, I wonder if my son would still have a peanut allergy? Its impossible to know though, so I try not to feel guilty for too long... though because I am pg, and because of my experience with Aidyn, I am avoiding peanuts during this pg...