Ultrasound placenta? growth scan help

Abby • Child of God✝️. Happily married 💍. 23 Yrs old. 💖👶🏼 DD 3rd May, '16. 💙👶🏼DS 22nd Jan, '18. DS 9th April, '19💙👶🏼 💖👶🏼 DD 17th Dec, '21 🤰 pregnant with #5 BOY 💙

Hello just was just wanting to get someone's opinion. I had a growth scan to monitor bub. I have a low lying placenta aswell they are watching. I've even experiencing some really bad pain on and off over the past month or so and just felt like it was growing/stretching pains of my placenta moving up and some round ligament pain. It would last about 10 minutes

I recently looked over my scans and realised something odd ? I've had 4 pregnancies.. this being my fourth I've never seen something like this behind my placenta before ! Can anyone tell me if this looks like an abruption ?

I have not had any bleeding but seems like sometimes you don't have bleeding because blood is trapped behind the placenta..

I'm really worried