Difference between ovulation & fertile window?

I was reading on a MD site about ovulating when I read this and was a little confused..  

"Mark Your Calendar

Doctors say it’s best to have sex at least every other day, especially during the 5 days before you ovulate, also called your “fertile window.” Sperm can survive for a few days inside your body, so it's ideal to have them already there waiting on your egg.  If your menstrual cycle lasts 28 days and your period arrives like clockwork, it's very likely that you ovulate on day 14, halfway through your cycle, and your fertile window begins on day 10. You're more likely to get pregnant if you have sex at least every other day between days 10 and 14 of a 28-day cycle."

I got off my period sometime last week. This morning shaving myself in the shower I had to remove (mucas?) before I could even shave, there was a bit much so I thought my calendar was right and I'm ovulating? (Its a clear stretchy mucas/discharge(?) 

-Just trying to understand ovulating ☺️