Dryness

I didn't used to have this issue, but for the past year I've been experiencing dryness during sex. I have never had to use lubricant before now I have to use it every time. It's annoying! And once I have an orgasim I dry up again. It's kind of embarrassing when I'm try to force a penis in a dry vajayjay!!! HELP!!! Can I buy something to help with this?