I have gone through this, I could not tell doctor as too embarrassed. One night, like you, I lost the plot and threw plates and then threw a chair at DH and then locked myself into the loo banging my head against the wall, I wanted to stop being IYSWIM.
It was f*cking scary for DH ...and me, and DH who is lovely just did not understand, was angry with me.
I tried to talk to doc about issues, but was ashamed.
I also had periods during the day where I managed fine, so told myself to pull myself together.
Then sometimes i snapped, and just wanted to run away. I remember standing by the door thinking I would just start walking and walking until i disappeared.
Bit by bit things became better, but then I started getting panic attacks. I went to the doc when i was worried about chest pains and having periods of feeling unable to breathe, and feeling like my skin was on fire.
He diagnosed neglected PND, resulting in panic attacks. I was stubborn and did not want to take drugs. I wanted to go to the root of the problem, and change my life (not sure I recommend this).
So I became more "selfish" and got a child minder for 2 mornings a week, so i could go swimming. I started easing up about cleaning and cooking, took time off for me. I also talked about it with friends. I started asking for help on days I felt I could not cope.
Taking drugs might have been better! But anyway, I managed to get out the other end, but it took years of baby steps.
Don't be hard on yourself and get help.
Do it.
And keep talking to us, or anyone.