CM conflicts with OPKs and shifting app conflicts with EverythinG

Michelle
First time engaging with the Glow community...but I'm an emotional wreck this morning and I guess I'm seeking comfort and reassurance from ladies in the same position...
Im 28 and its our 4th month TTC our 1st child. I'm super regular 28 day cycle and this month I tried Clear Blue  digital OPK for first time! Been using my first wee of the day (around 6am)...logging info in my app and checking my CM.
CD17 and still negative on OPK, CM said that ovulated like 4 days ago, but app keeps shifting my fertile window (and now saying that I have a 34 day cycle which is rubbish)!
We been BD regularly, but this morning I couldn't face it! I'm tired, headachy and confused...