Baby doesn’t want my breast milk

I don’t know what to say I’m so heartbroken. Baby has been drinking both my breast milk and formula for one month and yesterday we had a long day so he drank formula more thn breast milk. My aunt didn’t wake me up and I slept thru the night. Today my baby didn’t want my milk at all. He latch for awhile then cry. And my aunt would make comments like ur milk not nice that’s why he don’t want. She’s always insisting I give him bottle. Im so done she would make bottles when I told her I’m going to give him my milk. She would also proceed to give my baby bottles after he nurse’s because apparently my milk is not nutritious and he’s not full. How I wish she knows how draining it is to breastfeed. I tahan all the pain at the start because I want MY baby to drink my BREASTMILK