I've read a fanfic about baekyeol but I don't remember the title of it.

 It went something like, baekhyun mates with their pack alpha,  who which was an old man. Mated and baekhyun was pregnant with the child of the old alpha.  During the trimester their pack were under attack by another pack of wolves. The alpha died (I don't remember who killed the alpha,  baekhyun's then mate)  but the omegas were gathered into one spot.  During that time chanyeol the alpha of the other pack stroll around (as I remembered)  Baekhyun had a miscarriage then but the thoughts of chanyeol was glad,  not wanting another alpha's child to take care of.  (I don't remember if they took all the omegas,  but for sure baekhyun) Chanyeol unmated and sleeps with baekhyun,  taking him as a toy to satisfy his ual desires. Chanyeol bound to mate with a female wolf,  yet when he asked for some to fetch baekhyun from his shed.  Baekhyun staying in a shed with poor conditions and a thin blanket.  The day chanyeol had sent someone to get baekhyun,  baekhyun had already used the river nearby to cover up his scent as he ran away from the pack that had took him in as a prisoner.  When the person who was sent to get baekhyun had inform Chanyeol that Baekhyun was nowhere in sight he kinda flipped out. catching a faint scent of the omega and if he wasn't an alpha it would've been almost impossible to catch the scent.  Telepathy talking to his pack,  they had search parties looking for baekhyun.  Kris informing chanyeol that baekhyun pass over in an area.  

chanyeol saying something like "Kris the last time I checked everybody peed" 

Kris responding with something like "how can you tell if an omega is pregnant?"  with that checking out the last spot that baekhyun had done his business,  and indeed baekhyun was carrying his pup, but even he didn't know.  

DO IT SOUND LIKE ANYONE KNOW WHAT I'M TALKING ABOUT? THANKS