4 yesr old does not listen

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I try so hard to be a calm and peaceful parent. Its IMPOSSIBLE WITH A 4 YEAR OLD. IT gets dark 4 pm everyday. Im losing my mind. If I disciplineat all she will say" i.dont love you, your not my best friend, dont talk to me, your mean" she is so good out in public. As soon as she gets home she is out of control. She does not.listen. she messes with the dogs until i lock them in a different room and as im locking them in a different room she is on all fours trying to prevent that from happening. No amount of GENTLE PARENTING IS.WORKING AND IM GETTING SICK.AND TIRED OF IT. She refuses to do anything on her own. Im 5 months pregnant and cant do everything. I just cant im full time student and I.work full time. Every second im with her I give her my all. Anytine i can i.keep her home from childcare which is 3-5 days a week i.keep her home now to spend more time with her. We do.brain breaks every.night but she refuses to do them on her own and physcially i cant do it every night.