Confused

My app said I was supposed to ovulate on the 18th of August CD17, I thought I got what was a positive and BD during my window. I started to feel “different” on CD 27. Felt more like ovulation symptoms.

I did OPKs and for 3 days I had the darkest test line I have seen ever. I BD in that window also. The day before the super positive/day of/2 days after. Premom app ended up pushing out my next period start to the 9th of September making my cycle a 40 days.

I was getting mild cramping on 3dpo until yesterday 5dpo.. then this morning I woke up and I feel more like period cramping, which is about when my period would have started with my original CD 17 positive :( I’m discouraged and confused. Has anyone else had this happen to them and end up BFP? I won’t test until I am late from my period because I don’t want to be let down.

Sorry for the long post. Just need some advice