@Seriouslyworrieddad you’re not imagining it, and it’s not “just a bad week”. Something is going on, and it needs addressing kindly but firmly. But you have a part to play in this.
A few possibilities can overlap:
Postnatal depression (PND) - it doesn’t only appear in the newborn phase. It can emerge or worsen months later, especially after breastfeeding stops, when hormonal shifts can be abrupt.
Postnatal anxiety / rage - many women don’t realise that rage is a symptom of anxiety. It’s not about “being angry”; it’s about being overwhelmed, panicked, and dysregulated.
Sleep deprivation - six weeks of broken nights can push even a normally calm parent to the edge.
Isolation and pressure - SAHMs often feel trapped, judged, and solely responsible for the child’s wellbeing. That pressure can boil over.
None of these make her a bad mother. They do make her a mother who needs support and possibly professional help. And as from the sound of it, you work away a lot, people will assume she has help, when she doesn't.
And equally when you come home, you probably step in for a short while but she needs a break. She is coping with this 24/7 and you are not so don't underestimate the effect of that. she may well perceive you as drifting and in and out as the whim takes when she has no choice. Dealing with a screaming baby is not like reasoning with an adult.
Why this is worrying for the child, toddlers don’t understand adult emotions. What they experience is shouting, slammed doors, unpredictable reactions and fear but at this moment in time your wife is not doing this intentionally, she is not coping.
Even if she loves her child deeply, repeated exposure to explosive anger can affect attachment and emotional development. You’re right to be worried.
You can’t fix her mental health, but you can change the environment around her:
Stop minimising it - You are* *clearly trying to be supportive, but you are also normalising behaviour that isn’t normal. You need to acknowledge, calmly, that shouting at a toddler and losing control is not safe.
Encourage her to speak to a GP or HV - Not in a “you’re being unreasonable” way, but in a “you deserve support, this is too much for one person” way.
A GP can screen for PND, anxiety, rage, or hormonal issues.
Reduce her load immediately - even if you travel for work, you need to take over bedtimes when you're home, take the toddler for chunks of time so she can decompress, arrange external help (family, childcare, nursery hours) and stop assuming gym sessions alone count as “time off” - they don’t
Talk about sleep training realistically - Sleep training is emotionally brutal for some parents. If she’s already dysregulated, doing it alone while you are away is a recipe for disaster.
Protect the child without shaming her - If you hear shouting, slamming, or distress, you must intervene. Not by criticising, but by stepping in: “I’ll take over now.”
Address the blame cycle - Her shouting at you, blaming you for bedtime, and sending angry messages is part of the same dysregulation. It’s not acceptable, but it’s also a sign she’s not coping.
I think PND at least is a reasonable suspicion and its important you understand why. Breastfeeding stopped several weeks ago and men seem to think it makes it easier for the Mother but they don't appreicate or understand the hormonal crash that comes with it. and onto that the toddler sleep regression means she has chronic sleep deprivation too. You are working away so as a SAHM she may feel isolation and pressure and that creates escalating anger, these are classic symptoms. And then comes the guilt and emotional collapse afterwards, also classic. PND doesn’t always look like sadness. Sometimes it looks like rage, irritability, and feeling trapped.
Importantly realise she cannot help this, she needs help to address it and you need to step up, I appreciate you may think you have but at this moment in time you need to do more. As a SAHM she works 24/7, you might do a 10hr working day, spend a couple of hours playing Dad then you have 12 hrs chilling and sleeping, she does not, its constant, unrelenting and whilst it may upsets you that she blames you, that child is yours too and so is clearing struggling.
I'm assuming this is your first child and its a big shift to make from total freedom to being tied down to a screaming child 24/7, no matter how much you love them, this will not impact your life in the way it does hers. Not meaning to minimise your role as a Father, I know its a big shift for you too but right now, she needs you to help.
How you step up now, will define your relationship going forward.
Sending you hugs and best wishes.....it does get better.