Is breast milk lower at night?

The reason I ask is because like clock work between 6 – 10 she screams like she’s hungry and cries if I show her the boob.
I’m very confused as during the day I feel as though I have an over abundant supply as she chokes and coughs during let down and I can hear the milk squirting out then come 6 she’s screaming and tugging at the breast like a demon – she pulls at the nipple and cries and i do notice that let down doesn’t happen, I normally have 3 during her nursing but between these times I normally have 1 sometimes none.
So I’m wondering if I should give her a bottle during these times – does anyone know?
I know I’ve asked this question before which was a while ago so now Im’ starting to think it could be because my supply dwindles.
I just tried calling my LLC ladies but no one was available.