Just pick up the phone and ask your OB-GYN, I was working near a blueprint machine when I was pregnant and I worried about the amonia, but the OB-GYN told me it would be fine. Just ask to speak to the RN they'll either know or be able to look it up. Just be sure to tell them it's "spray adhesive" instead of spray basting to make sure they know what you're talking about.
And always stay keep it well ventilated pregnant or not. :)