I hate these nightmares. I hate my PTSD. I just want to sleep normally. Not dream about how my SO's daughter and her…

I hate these nightmares. I hate my PTSD. I just want to sleep normally. Not dream about how my SO's daughter and her mother are going to hurt everything I care about, from him to my cats and most prominently my daughter when she gets here. I feel like I'm going mad. None of it is founded or anything. Her mom and I don't always agree on things, especially with how to raise and handle kids, but not to that extent. Sometime his 3 yr old picks up on that and acts out on me, but it's just her being defiant and yelling at me. She's actually excited I have a baby coming, and always talks about it. She even pretends to make little clothes for the baby. I don't think she's gotten that it'll be her sister yet, but we'll get there. I've no clue where my head is getting this stuff from. I keep having to get up to get a drink and check on my cats every night, if I don't just give up and sleep on the couch with them. (They're allowed in our room, but usually don't join us as my SO moves a lot in his sleep. I sleep like a rock.) Does anyone know of something I can use to help sleep? Bendryl doesn't do much for me.