Am I just clutching at straws?

Me and my partner have been trying to conceive our 2nd child for 2 and a half years, we've been to the doctor and my partner has a good sperm count but not many are good quality.

Anyway so I'm 3 days away until my period and I tested this morning, at first inspection I saw nothing, but I always look at it in all angles, and when I looked at it at a different angle I saw a slight line, I thought I was seeing things, so I kept checking and it's definitely there, but only in that certain angle. Thought nothing of it because I've got my hopes up so many times just to find out it was nothing, but anyway, I took my partner to work, come back and took another one and it's exactly the same thing, only at the certain angle. Even when u can see it at that angle nothing will come up on the camera. I'm confused, and I know I'm probably clutching at straws here. Maybe it's because I'm just so desperate to have another baby to complete our family. My son will be 4 next month and I always said I wanted my children to be close in age, but unfortunately that's not gonna happen now.