Am I crazy for letting this get to me so much, or is it normal?

Please, no mean comments. My whole life i have always let things get to me. Last night my mom told me a story, and I have been devistated ever since. We were talking about hoow I really don't trust anyone to watch my children (especially guys). I am not sexist, but the only people i will leave my children with ever are my mom and my husbands mom. This weekend my husband and I are going to a friends wedding and staying over night at the hotel so we needed a sitter for our 2 kids 9ages 21 months and 5 1/2 months). i was perfectly happy leaving them with my mother for the night, but then my husbands mom asked if she could watch my oldest son for the night. Her husband is my husbands step father and i really don't trust him. I trust her, but not him, so I was iffy about it. I was talking to my mom about this and then, in an attemp to make myself feel better about the situation i said "well, a 21 month old baby isn't really a targeted age group to be molested, is it?". My mom responded, "yes". and then she told me a story of her best friend in high school who was a nurse for the ER or something who got called to the scene of a baby who was only 6 MONTHS OLD. the baby had been analy raped and his/her splien burst because he was so small, and in the ambulance the baby died in the nurses arms. This story is HORRIFYING. I never knew or had any connections with this baby, but when I heard the story, i burt in to tears. i have been crying on and off, just in hysterics since last night when she told me. I can't stop thinking about it. i am putting a smile on so i don't upset my own children, but it is hard. It is almost physicaly painful to think about this. I feel like I am going to puke, and i feel so helpless that I can do nothing about this, or any of the other terrible thing that happen in this world. I don't know why my mom tells me these stories; she knows how they upset me. This one just put me over the top though. My husband tried coming on to me last night and i felt disgusted becuase I could not stop thinking about his. Is this a normal feeling to have after hearing such an aweful thing, or should i talk to someone about it? Like a counselor who can help me learn to not let the things i cannot control upset me this way. My question is, would you feel the same way, or is it unhealthy that i get upset like this? thank you in advance for your answers.