There could be two things going on. First, since the bleeding is around the labia, she might be in heat again. This is a little soon but not unheard of. Second, she could have pyometra, a dangerous uterine infection that is common after a heat cycle. The cervix opens during the heat cycle and bacteria is introduced to the uterus. This can be very dangerous for the dog and most dogs with pyometra need an emergency spay to survive.
You need to see your vet as soon as you can.
Let me know if you still have questions.
It sounds more like she is suffering from a urinary tract infection or urinary stones.
Dehydration CAN make for more concentrated urine and a stronger smell. If you suspect this, you can give her some pedialyte or gatorade to combat these effects.
I recommend that you see the vet as soon as you can.