if your female is in heat??? I just read that a female can go into heat as young as 5 months!

I guess it's not likely. I plan on getting Sadie fixed before she ever goes into heat but my vet waits till they are 6-7 months. SHe is four months now... I know they bleed but do they bleed through out the whole heat or just when they go to the bathroom? I have never dealt with this and hope I don't have to but just in case, what do I need to know?
Chewy is fixed so at least she can't get pregnant!!!