PLEASE help how long do I have ⁉️

Theodora • TTC # 1 IVF 🙏 Unexplained infertility/endometriosis

This is my chart it looks like I have the dip today but my partner doesn’t get back until tomorrow. I’m using special lubricant to promote fertility but how long after today’s dip

In temperature do I have before my window is closed 😩