New to OPKs. Help!!

Elle

Hi, I’m am new to using OPKs and starting to get confused with my results.

My fertile window was 30th June - 6th July (Cycle day 14 was as 29th June).

My OPK results were showing a weak LH surge on 29th June but haven’t got a positive OPK yet.

To make it even more confusing for myself, I’m having a crampy feeling today 🙈

Any ideas ladies?