overly sensitive

my due will be in another 2months and i noticed i've been so emotional and cried easily over petty matters lately. i supposed to have a movie night with him tonight but he suddenly spoke about his tight budget even it's only 2nd of the month while we walk to the cinema (he knew that i hate it when he start to whine about it, and every time he said we might not survive the month, we managed to SURVIVE!) . i felt so irritated and suddenly my tears burst out. he acted normal as if there was nothing happened and try to have a conversation with me but i told him straight that i don't want him in my sight right now; he left me crying alone at the walkway. and there goes my movie night. i get emotional so easily and even thinking to leave the house. ???