the bubble test??

M. • Two babies born angels❤️ God blessed us with our rainbow baby 🌈 and then another!
Year + trying and two miscarriages means infertility doctors... and it's pretty scary....
The doctor was super nice and I'm just anxious to start trying again and to know what's going on! 
My question is...anyone done the bubble test before?? I'm scheduled to do mine next week and I'm nervous!