Work dilemma and being pregnant

I'm currently 9 weeks pregnant and in a sector where I'm on my feet all day looking after small children, 40 hours a week for 360 euro a week.

I'm really considering leaving and going back to an office administration position, am I mad?

More money, less time on my feet I've bad morning sickness and feel an office job will suit better as I'm exhausted straight after work.

What would you do in the situation? I dont have maternity pay from the company anyway will be getting the Government state payment, and have a 9 year old too. Childcare alone will be more then my weekly wages staying in this sector.