Military Duty Called Right Before My Security+ Exam – What Are My Options?

I am in the National Guard and my unit got activated for a disaster response mission starting tomorrow My online, proctored CompTIA Security+ exam is scheduled for the same week I cannot change the duty, and my exam window is closing. I will be in the field with no internet access I am looking at very few options right now, including finding a secure way to take my online CompTIA exam through a professional service. Has anyone in the military faced a sudden activation that conflicted with a certification test? How did you handle it, and is there a reliable service for this situation?