I have longer cycles (around 35/36 days) but overall my periods are regular. I tried OPKs this month and I kept getting light lines up until about CD 16 then they darkened but they weren't pos. Then today I held my pee for nearly 5 hours with limited drinks and tested at about 420 and boom! Nearly no line! Its there but very light! Im so worried I some how managed to miss my surge even though I never got a pos. and all my apps say im supposed to O this week (just started my fertile week)

My CM seems to be on track with my apps. Its been fairly watery and today I started getting ewcm. Is there a chance im still gonna o?!? Does this happen to anyone else? Im so frustrated!