So I'm using OPK'S this cycle because we have been trying to get pregnant for 16 months now with no luck of conceiving. I had a miscarriage 17 months ago and ever since, things have been weird. Anyway. I'm on CD 17 and still no LH Surge. My periods have been lasting only 4-5 days since about October. I'm using the Clearblue OPK. I've been testing every day since the 13th. My period ended on the 10th. I'm starting to get really discouraged. Any advice? I want my rainbow baby! :(