So I've completed with Dawnguard questline, I sided with the Dawnguard. Currently, I'm trying to return to Fort Dawnguard to turn in Gunmar's "Hunting the Monster" quest and every single member of the Dawnguard attacks me on sight. I've reloaded to a previous save, just before entering Dayspring Canyon, but nothing has changed. I don't have a bounty, I'm not a vampire and I'm not accidentily hitting any NPCs inside Dayspring Canyon.
I have no idea what could be causing this, but the only thing I can think of that have changed since the last time I was in Fort Dawnguard (when I picked up "Hunting the Monster") is that I now also have the Companion quest "Escaped Criminal" and I'm now married...
Any suggestions or insight would be very welcome.