Making dinner with one hand

Tonight was the first time that when I picked up Poppy from nursery she put on a sad face. The 'why have you left me here?', gonna make you feel really guilty face. She stomped over to me and put her arms up to be lifted, and practically from then on (minus the car journey) she wouldn't be put down until bathtime. As if I didn't feel bad enough all day because of the crying and clinging around my neck this morning at drop-off. It was worse than when she first started there as at least then she didn't make me feel like shit each time. Hopefully it won't last too long and is just the result of having 2 weeks off.