The temperature keep staying low means no Ovulation takes place.
During the menstruation the temperature will be low..about 34-35. On the ovulation day, the temperature will drop to the lowest...then it will go up the next day. After the ovulation, the temperature should be in the range of to 36.8-37.00. If you get pregnant, the temperature will remain high, otherwise the next period comes, it will drop again. If your temperature remain low and almost flat, means no ovulation occur. Eventhough there is no ovulation, your period will come as normally also.