Some help please??

Gemma • Mummy to my gorgeous darling Melissa 15months old...trying to conceive #2 xx

Hi guys got a question if possible? So I got a positive OPK on 12th September (digital on with smiley face) so in the TWW...well today (after I wiped TMI sorry) there was the clear slippery stretchy CM that people have described as EWCM...so I'm a bit confused? I have had some mild cramps but nothing else and this only happened the once in the morning...any insights? Was the OPK test wrong? Am I ovulating now? Thanks all