OPK for pregnancy?

I heard that sometimes and opk can show a positive if you're pregnant. I'm CD23 today probably about 7-9 dpo. My opk defiantly went down/got faint after it surged around ovulation. Having some symptoms this morning but figured it's too early to test but thought I'd try and opk (I know it sounds nuts!). I miscarried in August at 8 1/2 weeks. I'm terrified! Here's the opk I took this morning at 5 minutes per instructions and 30 minutes later. FMU by the way. Thoughts?