Tria Blue Light for Pregnancy Acne?

Hi all,
I have been suffering from SEVERE acne since becoming pregnant. It could be a lot worse, I've had no nausea and I am SUPER grateful for this amazing experience!!! 
I've read in multiple places that the Tria Blue Light acne clearing system is safe during pregnancy, but the brand says to ask your doctor before starting use.
Has anyone else used this product? An OB-GYN mid level I work with says it is safe, but I have not yet heard back from my primary doctor.
Any thoughts?