Anyone with partners who work away a lot, how do you help your child cope?

My husband works on oil rigs for weeks at a time. My daughter is 20mo and just at an age where she understands he is gone, but doesn't know why or for how long. I talk to her about it, but she just doesn't really get it, all she knows is that Daddy is gone and she keeps asking "Where's Daddy?".She gets really clingy and insecure when he is away. This current trip is the worst. She panics when I just leave the room to use the toilet. I take her to nursery and she screams for me to stay, like she thinks she is never going to see me again. She has started doing this with other family members too. Her Nana came to drop something off and daughter was freaking out when Nana had to leave.When husband is home, daughter is fine. She's a really confident and independent kid. However I'm finding that when he is at work, she is turning into this scared, panicked and insecure little girl. It's really hard to see and I'm getting really worried about how this might affect her in the long run.Its also starting to affect my marriage, with being a single mum half the time and having to cope on my own and do everything, then have to be a family the other half, where daughter is super excited to see daddy and I don't seem to exist anymore. I feel like I am living two lives, with two different routines and rules... It's really hard.Any advice would be greatly recieved. Thank you. X via /r/Parenting http://ift.tt/2ux8iG1