I would definitely get her to the vet and have full blood work and her thyroid tested. Perhaps your vet will let you make payments or you could apply for Care Credit? IF it is her thyroid it will get worse without treatment.
Also, what kind of training have you done with her? Is she on "Nothing in Life is Free?" That can help a lot! Does she have a safe space where she can get away from your kids? She may need that too.
Ruth & the 4 Legged Rescue Gang
Rafi the malaroo
Gio & Varda, the krazy kittens
....In my heart: