I think she needs to be left alone if eating and drinking. Chick shipment sucks and
TSC orders huge piles of chicks just waiting to smother each other. I would say umbilica problem and gentomycin injection would help. It may have been dropped.
Here is one problem I see. How long has she been getting grits and oatmeal? Lets hope cooked Because both will create crop impaction dry and even the wet will steal water if she ate a lot.
No enemas. No. I see overhandling creating a lot of stress on chick. Occasionally, yolk if large will take up to a week to completely absorb and looks kind of bulgy and sometimes off color.
I do not handle my chicks first week of life. Their bodies are trying to piece together physically and neurological and they need beaks to be dipped in water making sure they drink and electrolytes and probiotics. Heat at 95, clean floor and medicated starter. All of my chicks are fed mana pro game bird starter for one week because they need higher nutrients. After that medicated crumbles.
Sometimes, too much nursing can be a bad thing. They should be running around, eating, sleeping, and pooping.
No bright lights, noise etc. I feel she needs to be allowed to acclimate to new environment, new feed and no grit at that age. Grit is not needed until they eat corn/seeds. Again.. crop impaction culprit at 1 week. I really feel like your over-worried and she needs to be fed only crumbles because all your giving is too much for new digestive system. Animals can sometimes be treated like people but a lot of times it ends up with a dead chick. Give her time, if you want to help, make sure she at right temp and put some dry rice in a washcloth(I buy individual rice bags to hold rice and wrap cloth around) then place in microwave for about 30 seconds then place her on top. It will work to bring down swelling and use like a heating pad to breakdown hematomas and pasty butt. Too much lovin chicken mama but thats ok. Regroup and blame it on
TSC and tell chick mommy gonna get that bad store! Shame on them! I feel so bad for shipped chicks. Usually hatch assisted with sharp object, damaging face or brain or Tossed like salad on the way there. Chicks have hearts too! Yall need naps. She will be ok for now.