Grouchy - MIL doesn't actually help and just makes me feel more stressed I completely relate to this! I find "help" to be so stressful. I'm so used to doing everything (a certain way!) I find having to explain it all more hassle than it's worth. Also it just makes me feel like shit admitting to what I haven't managed. MIL brought a pinny and cleaning gloves when baby was born, my bottle of Milton was virtually emptied as she cleaned everything that stayed still. It was meant as a support but felt like a judgement, like she'd been waiting for months, staring at my skirting boards, just desperately waiting for me to go into labour so she could scrub them. She ironed all the laundry including my massive comfy bloomer pants that stretched over my 40 week bump, oooooh the indignity (that's one for the Thomas Tank fans!) She is so lovely but sharing space is very hard, especially after having a baby. Also, she riles up my toddler and his behaviour deteriorates and I feel I can't discipline him/talk to him how I normally would.
About your other children - again I can totally relate - the lack of sleep makes all the small things that you'd normally calmly deal with seem so much worse. im trying to be really mindful but yesterday I was really cross with my wee boy. He could argue black was white and he was grabbing something from me and he went into a full tantrum when I removed it. He stormed into my room and randomly pulled my clothes down from the hangers. Normally I'd talk to him/pick him up and move away from the problem but I was holding the baby so I held his arm firmly and steered him away while ranting. Anyway, my elbow somehow clipped his ear and he ran away crying. I felt like a complete shit. All forgotten about after we'd read a story.
That's the thing Grouchy - They forget quickly, don't harbour all the bad moments, just push on. They love you and they know that you love them, that's enough. Pick your battles, lower your expectations. The other day my toddler ran about with no trousers on for ages until he was ready to put them back on after a wee. It had become a stand off and I could feel my blood boiling and so I said (in my head obviously!) fuck it, who cares, it's an argument I don't want.
The tiredness clouds everything, it's hard to gauge your MH when you are hallucinating with exhaustion. Is your baby BF/FF? Could you do night about with dh?
Also re in laws - get your husband to suggest they stay with SIL as baby is noisy so they'd sleep better. Make it about them, not you.
Sorry for the essay. I agree with post it - I'm doing great
But keep posting about pnd if you're worried 