You agreed provided you could return to school. There was an implicit assumption that he would support you while you were in school and that you would also take care of the house and children. It seems that your husband has reneged on his part of the bargain, that of providing for you. Finances are one of the leading points of contention in many marriages. The are no rules on how one should deal with money issues in a marriage.
Some couples put all of their income in one account.
They then decide on how that money will be spent. Other couples keep separate accounts as well as a joint household account with each partner contributing an agreed upon amount to the household account. Still other couples decide that one partner will control the finances. Some men give their wives their paycheck and retain an allowance for personal expenses. In some marriages the man controls the finances, giving his wife a household allowance including money for herself.