can you get a false positive OPK

Yes

So the Positive I got this morning counts?

OPKs (Ovulation Prediction Kits) work by measuring the presence of Luteinizing Hormone (LH) in your urine. A surge of LH which is sent to your ovary causes your ovary to produce enzymes which in turn causes the dominant follicle to rupture and release the egg into the Fallopian tube. This is ovulation and it is expected to occur within 24 hours of the surge of LH. An OPK is thus expected to be positive the day before you ovulate.

First morning urine is usually not the best for OPKs since your LH surge usually begins in early morning when you are still sleeping and may not be apparent in your first morning urine. If you test in the early morning, you may miss your surge entirely since LH levels may already be reduced by the next morning. Late morning or early afternoon is usually best unless the instructions suggest otherwise.

So, if you don't test at the right time of day, you will miss knowing when you are ovulating. It is not a matter of positive or negative.

Maryann