Ben wa balls...?

So, hubby and I tried Ben wa balls last night while DTD. We wanted to try something a little different, it was great, but now I'm concerned that what if the Ben wa balls were in the way, or interfere with me getting pregnant?! 
I got positive OPK yesterday, now I'm kinda freaking out!
I hope we didn't screw things up this month! 
Does anyone know anything about this? 
Thanks in advance!