behaviour change

i'm a ftm to a 6 month old preemie. as a newborn she was an angel, as she's growing her behaviour is changing which is normal as she's taking in the world around her BUT for the last week, my baby has been literally so moody all day everyday, screaming and gurgling when i try to put her to sleep. dosent want to be fed, changed, on her tummy, on her back, cuddled. NOTHING works. we keep the screen limited as much as we can but sometimes it's our only hope for a minute of quiet. i assume she's teething but honestly i dont see anything and have been trying to soothe the pain as much as i can. her feeds are getting worse aswell and she dosent eat 170 ml unless she's sleeping. i dont know what to do or how to help her anymore, i'm totally alone all day as my partner is working, we go outside very often but obviously we can't stay outside all day just so she can be calm 😅. Please no judgement.