Nala went into heat last weekend. I noticed her bleeding on Saturday, and promptly looked up how long it should last (it's been a while since I had an unaltered dog); everywhere I looked said she should bleed for 7 days. it's been 10 days; she's still bleeding (rather, there's still reddish fluid coming out.) should I be worried? I have every intention of calling the vet about it tomorrow, but I wanted to know what y'all thought. shes 7.5 months old, so it's her first heat. would that make it last longer?