anyone get pregnant while still nursing?

Lauren

we've been trying unsuccessfully for a 2nd baby and I'm still nursing my 19 month old. I'm starting to wonder if continuing to nurse could be creating a problem? I get a period but it's very irregular. I've also been using ovulation prediction strips that say when my hormones are peaking but I guess that doesn't guarantee ovulation. any advice out there? my son is not ready to wean so hopefully that's not the issue.