I called and the nurse at the breast center and she said no mamm for me. She cancelled the appointment and congratulated me on my BFP. I could not get in touch with anyone at my RE's office.
I would call them as soon as they open in the morning and ask. I don't know particulars about the risks of a mammogram screening during pregnancy so I can't tell you either way, but it's definitely a good idea to ask before you drive al the way there in case they need to postpone it until the 2nd trimester, or until after your pregnancy.
Congrats, btw!!!!