Sick and letting kids do nothing.

Am I bad mom?
I'm 16 weeks pregnant with a 5 year old and 3 year old, most days im okay, some days, like today I can barely function, vomiting all day and nauseas and very tired. I forced myself to take them to the park for an hour after lunch but once we got back I felt miserable, so I let my son play mariocart on the wii and my daughter watch a movie while I laid down (rested not actually sleep because I can't physically fall asleep while my kids are awake) I let them start at around 1 and it's now 4 and I'm still barely functioning, am I a bad mom for letting them do pretty much nothing all day?! 
I'd give anything to feel okay again...