Getting wet?!??

So I had our dear son 2 years ago. Prior to having him I got wet really easily just by thinking about my sexy hubs(tmi, sorry). Though after giving birth my sex drive hasn't changed at all ..I can't get wet, I mean I don't, at all! I know I want it and that naturally everything down there would lubricate itself but nope, not anymore. I could be very turned on but completely dry down there. Haven't gotten wet not even once after giving birth. It's sad because getting me wet down there would turn my hubby on so much and me even more as well.

I would like to know if this is considered normal or a problem? And is there any way to bring that back? For now, it's all about lubricate.