OPKs all positive

Jaci • Baby #1 EDD Oct 16/15!!
I am on CD10 and my 3rd day doing OPKs and so far they all look positive?!!? Last 3 month O days were 11, 19, 22. So totally unpredictable...
Last few weeks I started to take vitex, EPO, and geritol to regulate my cycle. How do I tell if they are actual positives ??