OPK help.

last month by cycle was 47 days. I am in cycle day 25 of this cycle. My bbt went up by .73 this am. I was using the Clear blue Opks which give u a smiley or a empty circle. Today the screen went blank twice giving me no result. The instructions say that the 2 lines on the end of the test strip don't mean anything and up until today one has been faint and one has been dark today the were both dark twice....does any one know if this actually really means nothing? I used a cheapo opk for the 1st time today as well but have nothing to compare it to will post a pic of that. The picture is the same test. Gkiw says that this is the week but with my long irregular cycles how does it really Know? Whatvare your thoughts?