And Red, chiming in here re morning sickness..I was a pro at it. My first pregnancy I only had 3 months, second pregnancy close to 6 months. Pretzels work great for nausea and a little more substantial than crackers. Also, after I would wake up and chew my saltines and or pretzels, oatmeal made with whole milk and sugar were the best thing for my stomach and I lived on it for both pregnancies. I didn't have a problem with leg cramps, but if you do, the banana of course could be cut up into the oatmeal.
And rest. Please let listen to your body when you need it. I realize you have a physical job and it won't be easy, so also, please be careful. In the first few months, I would fall asleep at all different times at the drop of a hat. I remember on visits to my ob/gyns there would always be at least one patient nodding out (and sometimes that would be me).