PPD or understandable

This morning I asked my husband to watch the kids (19 months and 1 month old) for one hour so I could get groceries I was gone for an hour and 10 minutes when I came home first thing he does is say "what the fuck, I've got shit to do today I need to go to the toilet and have a cigarette and I can't because you take so fucking long, I don't give a fuck if your angry you need to sort your shit out" I burst into tears and he left to go to work half an hour early I feel like this was uncalled for I watch the kids by myself no help at all 6 days a week for midday to midnight I manage to go to the toilet and shower and do the housework cook and clean while watching the kids and attending to them I am so upset right now, am I over reacting a bit? I think my tears are mostly from frustration