CONFUSED

This month we were determined for it to be our month. We BD all through our fertile week, & the day before O, & after!! I really felt like I was having a few symptoms. I had a nose bleed (I never have nose bleeds)! & then at 10dpo I have a really sharp pinch like pain on my left side lasted for about 15 seconds. Took my breathe and everything. Today @ 12dpo I woke up to a really like colored discharge which has gotten a little heavier, (not heavy like normal period) & gotten a little bright red but still has the brown. Anyone have ideas?? I’ve tested multiple times & keep getting negs. I need peace of mind!