Unsure about my test? 11 DPO and 4 days before expected AF

So I've used first response before and this is the first time this has ever happened.. instantly as the urine spread across the screen a white very faint line appeared exactly where the line should be... has anyone experienced this before? I'll post a photo.. not sure if it's a complete negative or if I have some hope to cling onto.

Ps I've been ttc for 8 months.