DD (3yo) has been awake since 3.30am screaming her head off, getting out of bed and refusing to get back in, throwing toys around... basically making me lose the will to live. As I type this she is still sitting up in bed shouting "mummy,mummy,mummy,mumeeeee!" occasionally pausing to yawn and rub her eyes before she starts again. I've had to walk away from her before I completely lose my shit. This has happened out of the blue after several months of her sleeping really well so I'm feeling very disheartened right now. Not to mention exhausted. I work full time (as does DH) and it's been a long and very busy week. I felt like I was running on fumes even before this 
We have a lovely day out planned for today. It has been booked for months and the tickets to the attraction we're going to are non refundable. I don't know what to do now. DH thinks we should still go. I'm not so sure because the idea of dragging an emotional and exhausted toddler around a crowded attraction when we've all been up half the night seems like a recipe for disaster. I am also worried about rewarding her with a special day out after the way she has behaved, it seems to send the wrong message- although she has only just turned three so not even sure whether she would get the message either way!
We have to leave the house at 8am at the latest to catch our train. I'm too tired to make a decision. WWYD?