What the hell does this mean?

I'm 7dpo and I ovulated on the 11th sept. Today I had a bit of egg white discharge which is strange as I don't normally get very much of it. So just out of curiosity I thought I'd do a ovulation test. It's come back with a faint second line? What does this mean? Can you ovulate twice in a month? I've never been diasgnoised with pcos and my periods are like clock work so I don't think it is that? Help!