pregnant....and broke

Hey. I'm married and pregnant with baby #3. We are living "paycheck to Tuesday". I usually don't like asking for help but we applied for food stamps and just barely made the cut off...which is almost worse because we almost made it and are broke but didn't😩 what kind of things do you eat to ensure enough nutrition on a strict budget. We have teenage sons (I had them when I was much younger) and big appetites. Lord this is hard sometimes but I know it will be okay.