Hamster pregnancy questions

[Peppermintmocha]

Hi everyone , I recently started breeding Syrian hamsters after extensive research on genetics , coloring, and care. But as much as I've looked online and in books and asked around I can't seem to find a solid answer to my questions.
My female is a LH sable umburos and the male is a LH banded black eyed cream both from different breeders , and the female I have been told does not carry the white belly gene, has anyone ever bred these two , what kind of colors did they get in their litter ? And secondly , my female mated about 6 days ago , she went into heat after 3 days so I assumed the mating didn't take so I tried again , but the next day more than 24 hours later she was in heat again , she let off the same odor but she didn't seem to "freeze". I've heard of females doing this while pregnant, has anyone experienced this? Could she be pregnant or could there be something wrong with my male or female ?