Sticky mess during sex

So my boyfriend and I have been together for almost 4 years and for the last 2 months we’ve been having a hard time during sex, not always but majority of the time. He says it’s hurting him and when we look I have white sticky consistency coming out of my vagina that makes it dry and difficult to do it. is this normal? What could this be? It’s really frustrating and I just want to know what’s going on. I have no odor or itching so I don’t understand.