Indiana Laws About Dept of Child Protection Suspecting Sexual Abuse

I am the father of 2 children, who live with me. I also have a
girlfriend who has 2 children. They live here as well. We have been
together just over a year. My girlfriend's daughter is 12. She has
been a chronic bed wetter since 2. Not consistent, she has long spells
of not peeing the bed, and then she starts up again Her doctor noticed
white blood cells in her urine a few weeks ago. She was also diagnosed
with a urinary tract infection. For some reason, Child Protection
Services (Cps) called my girlfriend today. They believe the peeing,
and blood cells, and infection, somehow point to sexual molestation.
Now I have serious panic attacks and Obsessive Compulsive Disorder. As
well as a hefty case of paranoia. Being that I am the primary male
figure in her life (her dad is out of state) I can't help feeling that
that makes me an instant suspect. I see movies and such all the time
where innocent people get arrested and jailed. Put on trial, whatever
horrible things happen. Though her daughter swears no one has touched
her,especially me, and there could be absolutely no evidence that I
did anything inappropriate, since I didn't. My paranoia keeps sending
me visions of police at my door, handcuffs, a jail cell. I need some
sort of reassurance. I have worried myself physically ill. I feel
nauseous. Please tell me something. I am poor, and have no money to
defend myself legally, God forbid I would ever need to. Please help.