Lube and sperm

Kelsey
So I've heard that lubricants can cause issues with sperm reaching the egg. My boyfriend and I always use a lubricant because I feel like I can never get wet enough without it hurting (sorry if that's tmi!) Anyways, is that actually true? I'm about 3 weeks late for my period now and it never occurred to me that I could be pregnant because of the fact we use lube.