Ashley, I'm so sorry! I've had dogs & cats too that fought, it's horrible!
I'd keep them separated when you're home also until it's resolved. It
may be hormonal & dominance issues or could be a medical issue like
thyroid out of whack, etc. She needs blood labs drawn, could be done
as part of her spay *be sure to discuss all w/vet so all can be checked
and ruled out. Separate rooms (gated off) or one out & one crated, do
not wait until a serious injury & permanet damage. Also, the longer it
continues the harder to stop it and it will escalate. Will pray for y'all <3