I need food advice for a 12 hour road trip?

I am 3months pregnant and I tend to get nauseous if I don't eat every 3-4 hours... but the food that helps me are protein rich foods, not cereals (trail mixes), bread, or sugary granola bars, which are the easy ones to take on a trip. Please anyone have any wholesome and hearty protein foods that can survive on a 12 hour road trip? I already plan on taking fruit and veggies, I am just looking for healthy protein suggestions. Thank You so much.