PH Balance?

I've noticed for a few months now that I've experienced very little discharge (cervical mucus). It's always been fairly heavy during ovulation, but now there's little to none. I've also noticed that, before and during intercourse, I'm not nearly as wet as I have been in the past; even when I'm in the mood. My cycles are regular so I don't think I'm pregnant, but I'm wondering if my PH balance is off or something. Should I just go buy so Summer's eve to see if that makes a difference?