Keep Having Bad Dreams

I've been having nightmares. Last night I had a particularly disturbing nightmare.Dream is in parentheses.( I was supposed to be looking after this disabled teenage boy. I put him in the bath though he was fully clothed to clean him because he smelled horrible like he was dying. Then his whole body slid down the drain and when I looked down the drain his body had fallen into this dark room and broken to pieces. Someone's yelling at me telling me it's my fault and how could I let this happen and I just keep saying he shouldn't fit down the drain and I feel guilty and confused. The next part of my dream I have a new baby and my family has been taking care of her and they're trying to take her away from me so I get a job and apartment and leave with my baby. The next part of my dream my husband is trying to take pictures of a girl I know in the shower, she is fully dressed. She's standing in the shower and her hair has been cut and the waters running and my husband's flirting with her and using a professional camera to take pictures of her face and she tells him he needs to stop because she doesn't want to upset me and he says it's fine.) Does anyone know what could be causing such disturbing dreams it makes me feel sick to my stomach? My life is fairly normal. But these nightmares are messing with me.