Alright lady's so my boyfriend leaves town for work often. Sometimes 2 weeks at a time and his boss…

Alright lady's so my boyfriend leaves town for work often. Sometimes 2 weeks at a time and his boss never lets him know in advance. I'm almost 18 weeks and our appointment is scheduled next week to find out the gender. He wants to be there to see but he will be out of town. The only available appointment is in December. I don't know if I can wait that long, but I want him to be there as well. What do I do!