Hello, and welcome!
I'm sorry Doodle Bug is not acting like herself.
The symptoms you mentioned sound like she is in pain and that's why she's being more aggressive with the other pets in the household, and seeking more comfort from you.
If she had a problem with her kidneys a few years ago, this may have recurred or something else may be wrong. She could have jumped down from a height and caused trauma to herself, unbeknownst to you.
At this point, it would be advisable to have her evaluated in person by a vet, so she can be diagnosed and treated, if necessary.
If she's still eating, drinking and eliminating as usual, that's good, but you said you weren't sure about her elimination, I guess because you have a multi-cat household? Feel her body all over, gently, for any pain responses and also see if she feels unusually warm, as that would indicate a fever. If she does have fever, this could be due to a bacterial or viral infection in her system, which needs medication from the vet.
For the moment, you can try some Feliway plug ins, which emit cat calming pheromones. You can find them in your pet supply store.
I hope all will be well with Doodle Bug and please keep me posted on how she's doing. Thanks!
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