Am I to over my head?

So my fiancé is in the oil field. And he moves around from state to state. This is our first kid and I honestly don’t want to be alone through the labor and raising him. He keeps saying he will make it to the birth but he’s going off shore this time. And it’s 6 hours away. I understand I’ll have my mom, grandma and a friend, but it’s not the same. I feel like my son should have his dad around. I honestly feel like I’ll be a “single” mom without being single of course. I don’t want our son confused because there’s this man walking in and out his life and may not see him for months or a year.My anxiety is through the roof because I feel like he doesn’t understand where I’m coming from..