ovulation test line way darker than control line

On 12/20 I took a opt because I had discharge that resembled as if I was ovulating the test line came back way darker than the control line and af is due to visit on 12/23 I took a pregnancy test yesterday because glow recomended it, I got a negative a few hours after I had very dark spotting...my boobs are extremely sore and I'm having very dark spotting again today can use the panty liner all day what could this mean I didn't think u ovulated that close to when af was near