We are expecting our first baby in a couple of months too. So, no real experience here but I want to share some info that I gathered from different sources, in case it might be helpful.

If the baby cries at night and don't want to eat its a sign to look for another reasons. There's non obvious one: gases in the tummy. They appear because of an adrenalin which baby got with the milk. If mother is angry/stressed an adrenalin goes into her blood and then into milk. The baby eats, his tummy filles with gases, he cries, mother wakes up stressed and so on... The way to get out of this loop is to decrease the amount of stress for the mother. I know it's hard, because of harmones rage in her blood but you need to be a psychologist here and try to calm he down.

Like they say, keep calm and carry on. It should get better in few weeks.