Is there any possibility the nuts were rancid? I’ve found that if I eat nuts that are not fresh, they can make me feel sick as well. I now buy smaller quantities and keep them refrigerated. Oh, and ALWAYS smell nuts and seeds before I use them…they can get pretty nasty. Also, have you tried Nutritional Yeast for sprinkling over pasta? Many brands are fortified and a single serving provides plenty of B12 (which I hope you’re including in your diet…all the plant based docs warn about not getting B12, even for meat eaters these days).