ParaGuard Copper IUD & Spermicidal Lube

Sy
Hello everyone. I currently have the copper IUD and have had it for a good 3 years already with no complications. So I have two questions; 1) Has anyone THEMSELVES gotten pregnant with an IUD, with it being in the correct position? 2) Does spermicidal lube actually work? If so, what is your favorite brand? 
I have a very paranoid boyfriend and I myself am not ready for children and condoms are meh, so feedback would be much appreciated!