Definitely get a doula. Even with our second baby, my hubby was clueless about how to help. Emotionally he was good, but he just wasn't much help as far as being an advocate for me. I still remember being monitored and him telling me "oh the contraction is still getting stronger - keep breathing". He didn't understand that I could tell that the contraction was getting stronger and that I what i WANTED was for him to tell me when the contraction peaked and help me focus, not how bad it was getting! Even after the 5th time, so finally I told him to shut up or get out if he wasn't going to listen, and he got all offended and hurt!
When we had our third, I had a midwife. It was a huge blessing for us. He could come and go as he pleased, helped to calm our older two kids and explain things to them. And best of all... the midwife was there for me. She held my hand, gave suggestions on positions, soothed my nerves, told people to shut up when i had a tough contraction, ect. All the things I had wanted hubby to do, but he just didn't understand that he needed to or how to.
best wishes and sending good vibes for an easy labor!