TTC for a BFP December....

Marissa

I need answers or opinions anything you guys can give! I have started opk and I'm on cycle day 12! I took one yesterday (top) cycle day 11 at 7:30 at night... then I took one (middle) cycle day 12 at 7:35am and then again at 8:15pm. The lines seem to be getting more faint. Shouldn't the line become more visible closer to ovulation? I'm afraid I missed it but I'm only cycle day 12!!! Any help would be great! TIA!