OP, this is survival mode time. Eat whatever you can manage to keep down, and eat whatever time of the day/night you are hungry. I have never had much cravings when pregnant, but I have massive food aversions and like you have lived off of starchy carbs even though I hardly ever eat them when not pregnant. When I was pregnant with my first I don't think I ate a vegetable in about 4 months, I would vomit at the sight of them in the fridge, and that was while taking anti-nausea medication. It is not always possible to force yourself to eat healthy if your sickness and aversions are very strong. Take your prenatal vitamins, choose healthy options whenever your body allows, and at other times just eat whatever doesn't make you want to die. Your baby will be fine and will take the vitamins and nutrients it needs. Once the sickness subsides you can focus on healthier options and exercising to combat the extra eating you may have done in the first tri.
Beans are actually an excellent option if you are suffering from nausea. I'll try to find the journal article but research has shown that eating beans or other legumes whenever you feel nauseous helps to reduce sickness. Can't remember off the top of my head but has something to do with the bile released by your gall bladder when you eat beans.
At night I pack myself a little snack box with some cut up apples and rice cakes with unsweetened almond butter. I am up 3-5 times at night with my 1 year old so when I get back into bed I'll have a few bites of something to keep the nausea at bay.