Pulling hair out. Help please.

Hi,

TTC for 5 months. I’ve been using 3 different opk’s this cycle. I started on CD10. Currently on CD15. 2 times in these 5 months I’ve gotten a bfp with the strips. Last month I decided to try first response digital. All bfn! But my doctor said I ovulated according to my temp chart though. I’m also on Clomid which my doctor says that’ll hopefully make me ovulate on CD17. Here’s my confusion. Wednesday night the strip looked really close to bfp but digitals said NO! (First response and clear blue easy) Tonight, all 3 bfn! So confused. Idk how I can get “almost” or “maybe” positive then nothing the next day. Also my temp has not spiked at all. Any help would be appreciated. Thank you.