Hubby and labor

Kat • I am a Texan abroad with my sweet hubby and a beautiful 19 month old daughter and trying to conceive our second child.
So my sweet hubby has been really unreliable about answering his phone lately while he is at work. I know he is super busy but I am almost 37 weeks pregnant and home from work for the week to get my BP down, so I am terrified that labor will start and I won't be able to get a hold of him. We live overseas and I don't have any family here. Any suggestions for how to handle it? Has this happened to anyone else?