Cervical position and CM help

Jennifer

Hi. So I'm kinda unsure what this means and Google didnt fully help. Maybe one of you ladies will be able to tell me what it means...

Today 7/15 my cervix was high (hard to reach) open (enough to put fingertip in) and my CM is creamy and light in amount. Last night my husband and I had sex and I was very wet and increased sex drive. Did I ovulate already? Is cervix only open when you're fertile or can it be open at other times in your cycle as well?

Please help me understand