Tears

Today has been tearful
Charlotte walked into her room at nursery couldn't see her key worker, burst into years.
I left got into the car then cried because i felt so awful leaving her crying, I rang up after about thirty minutes and apart from a nappy explosion, she was fine.
I collected her from nursery, she was sat in the corner happily playing with iggle piggle, saw me and burst into tears.

Advice please... Suddenly bedtime has become a huge battle, she has her milk, chills, story etc but as soon as I go to lie her in the cot, she cried hysterically. I leave her for a few minutes feels likes hours then go back into her room where she says cuddle. We have a cuddle, she settles, then the same hysterical pattern begins.
Tonight I have been tougher, only the one pick up and cuddle, the rest of them I have laid her down and just had my hand on her tummy. Each time I tried to move the hand away she cried.
help.... All advice welcome because I can't let bedtime take over an hour which is what it has done the last few days! (That's an hour of trying to get her in her cot)