Sleep regression or something else?

Baby Mo will be 4 months on the 11th. She used to fight her sleep sooo hard & wouldn't go down until 4 or 5 am!!! She's been sleeping pretty well lately ONLY if she sleeps with me 😏🙄 (believe me we try the bassinet& crib over and over & I wish it worked).. bath at 8pm, feed & asleep by 9.. wakes at 4am back to sleep until 9. But tonight were back to fighting sleep & screaming. I tried everything. Finally I put her in my baby wrap & walked around the house for an hour & she finally went down, I layed her on the bed and she slept for about 35 minutes & woke up like she was terrified, never heard her cry like this before. Shes not really a nap taker during the day either, like maybe 1 or two 30 minute ones. Has anyone else's babe gone through this at this age...early 4 month regression? Teething? Something else?

Posting happy pictures of her since I'm still so sad over her new hysterical

cry 😢😢😢😢