TTC Ovulation Questions

Meg • 🍍
Hi ladies!
I'm TTC after a MC (my first MC and first pregnancy 😢) and I have a question about ovulation tests. 
I took a test this morning and had a solid test line, not quite as dark as the control but almost. This afternoon it was lighter. I'll still get DH to BD with me tonight (I know he won't complain hahaha), but I want to know - did I miss my window??? Or should o retest tomorrow to see if it gets darker again?