wet down there

Soooo I was doing the dirty the other night. And everything was great and wonderful and I was super wet, like exceptionally wet but here's where the problem occurred. No matter what he did, or what I did, I couldn't finish. And while he was down on me trying to get me to finish before him (sweetheart) he said something white and kinda stringy came out of me. Is this normal? Should I be concerned? Does it have something to do with me not being able to finish at all?