HELP! Need advice from partnered mothers!

Gemma
I don't know if this
I'm worried that when I take maternity leave, my partner will assume that as I am not working, I'll be doing all the cooking/cleaning/everything. The thought of having a child, having to do everything, fighting if I don't get everything done, fighting when I tell him I can't do everything completely overwhelms me.
It hasn't even happened yet!
I only feel this way because right now he works longer hours than I do, so there's always this expectation that cooking dinner is my responsibility. A lot of the time I get the line, "I just want to relax" and "you've had time to relax" (when in reality, I've got straight from work, to my second job, to cook dinner).
I don't want to resent him, but I don't know how to tell him that I'm really worried about this!
What can I do?