Test anxiety!!!

Cam • living the life I've been given.
Today is the last day in my fertility window. I've had sex 3 times during my window of opportunity and I'm feeling REALLY confident we got it this time. My projected period is on the 14th-ish. When should I take an in home test? Could I take it a few days before? I've had 3 miscarriages in the last 4 months. HELP!!!!!!!!