I need HELP!

Brianna • Married 6/9/18 Pregnant with Baby #1 👶🏻 Dog mom 🐶x3

So my husband and I had sex last night and I’m in my fertile window well tomorrow is my ovulation day and ever since I woke up I’ve been having this dull sharp pain come and go on my left pelvic side. Can anyone tell me what that is? Has anyone had this happen to them before?