Mum burn out

[Mumma1799]

I write this in tear so apologies if it doesn’t make sense.
I had a baby 4 months ago, I have a 7 year old & my partner has a 10 year old. I’m on maternity leave & im just absolutely fed up, I should be enjoying this time but I feel like a ticking time bomb. Every day is just cleaning, cooking, washing, feeding & school runs. My bf works full time & by the time he’s back he’s shattered so I get no help with the children, he does his own thing which is either going to see his mum & dad or sat outside while I do bath time put them to bed & tidy up, I’m not sitting down till at least 10:30pm. His child comes every other weekend & im constantly picking up after them as well as my own kids. My 7 year old acts like a toddler with the tantrums & I end up shouting. My partner has done everything possible to avoid me tonight which hasn’t helped, he’s not speaking to me & this will probably last a few days. I don’t think he has any idea how I’m feeling & probably just thinks I’m being moody when in fact I’m just exhausted & sick of having this massive weight of every responsibility on my shoulders. I feel so alone yet have a house full of people, I just don’t know how much more I can take.
I often feel like a single/lone parent as I’ve been one before with my eldest. The house we live in is my house that I have a mortgage on & baring in mind I’m on maternity pay, I pay all the bills even though he lives here. I have around £30 to last me the month after everything has been paid. I know I’m my head I need to just chill out & relax but I can’t, I can’t sit in a messy and dirty home. I don’t really know the point to this post, I just needed somewhere to turn to & cry.
if you got this far then thank you.

What does he actually bring to the relationship if he does nothing with DC and doesn’t pay anything towards bills?
It sounds like you would be better off as a single parent because that would at least get rid of two extra people to feed and pick up after.
You need to let the housework slide a bit, I know mess is frustrating but making yourself ill through exhaustion is crazy. Will he maybe pay for a cleaner if he isn’t paying for anything else?
I hope things improve for you soon

I don't think you need to chill out and relax, I think you need to give your waste of space partner an ultimatum that he steps up and splits the load fairly or he's out.

Thank you for your replies. Not seen or heard from him all day today, he got up at 7 with his child and went, forgetting he has another child, never said anything just went. So yet again another day of my own with the kids. I just don’t know what to do, I could do with going back to work but I just know I won’t be able to afford the nursery fee’s

Well you either need to sit down as adults and discuss how you move forward, or you go your separate ways. He doesn't sound very mature, and I guess it's not impossible to work out why his first marriage / relationship broke down.
I suspected you'd probably be better off as a single parent, but maybe try communicating with each other and see if any changes and compromises can be negotiated.

Do you have any family or close friends who could help you out for a few hours at a weekend? You sound like Superwoman, I know how hard it is. Your partner is lazy and is taking advantage because he knows he can get away with it. I'd be really tempted to book a caravan away somewhere for a few days (with your two) and not tell him where you've gone.