Opk Help - Positive twice in a cycle?

So top opks we’re cd 15 and bottom was cd 19... which would you go by? Why would this happen twice? Normally I don’t test again once I get a positive in a cycle but idk I felt like it again and confused... today I am on cd 28 and AF is late... I called my Obgyn and I have to call if I get my period or a bfp or wait to see him on the 19th as scheduled for a US and check up...