If the fasting day started, the fast is not invalidated if you are in the state of janabah, and your fast is valid. But you should hasten to take ghusl and offer fajr prayer in its appointed time.
If the fasting day started, the fast is not invalidated if you are in the state of janabah, and your fast is valid. But you should hasten to take ghusl and offer fajr prayer in its appointed time.