I caved and took a test, now I'm depressed :-(

Penster
So I caved and took a test, 10DPO and 4 days before AF due and I for this. Now if I look really closely and squint then I see an indentation but I know I am fooling myself, there's nothing there. It was a kit that said you could use it 6 days before AF due and aT 4 days before it would be 99% accurate. I am super bummed. Please tell me that I'm not out the running until missed AF! I don't feel any different either. This is so frustrating