Cycle & Testing buddy needed!

PeaCh • - TTC #2 - Endometriosis & Adenomyosis Sufferer - London
AF due 30th July. 
​Not sure when I O'd... CB digital opk said Thursday just gone, however I only started having cramps yesterday and today- CM changed, past 3 days it's got a yellow tinge, and it been stretchy and long stringy .. I'm assuming I did O becaue opk reading on Fri was back to low !