Shifter Sisters by Sierra Dafoe

One's a canine. One's a cat. And one's a vampire who hates the sight of blood. Together, they're the Shifter Sisters, a hard-rocking band of misfits who stand by each other when the chips are down -- no matter how much the fur might fly the rest of the time!
Luna, the band's drummer and a werewolf by birth, has a talent for hooking up with men who only let her down. But she never gives up hope or her faith in romance, and when a sweet, sexy stranger catches her eye, Lu is convinced she's finally found The One.
But how are you supposed to land the man of your dreams when you really do turn into a bitch at “that time of the month”? And can you ever find true love while hiding half of who you are?

I fell in love with Lu because she was suffering with a problem most women know about. She wanted someone to love, but she always picked the ones who couldn't love her and couldn't hurt her. The one man who intrigues her to the point of distraction is the one man she won't let herself have. Then too, if you turned furry every month its kind of hard to fall for someone who is 100% human. But in the end, she gets her HEA with a couple of bumps in the road.