Is it sleep regression or fear phase

TLDR: pup randomly barking at noises and sometimes nothing. Stopped sleeping through the night doesn’t want to be in crate

I have a cockapoo pup (mini poodle x cocker spaniel) she’s 5 months old now and for some reason she has started not sleeping through the night?

2 nights ago she woke us up around 2am husband took her out and she went potty and he put her back to bed. She kept crying, he went down again and realised there was vomit on her blanket so we removed it and put a different blanket in her crate but it took her ages to settle she was whining and howling off and on for quite a while.

Last 2 nights have been similar she wants to sleep on the sofa and not in the crate but my parents are looking after her in 5 weeks when my husband and I go on our honeymoon for 2 weeks so we want her sleeping in the crate. We do wonder if the crates too small? She’s 6kg. She will go in it when we put her to bed with minimal fuss.

She randomly barks at noises now such as planes flying over, birds chirping sometimes and sometimes at seemingly nothing.

Any help and advice is much appreciated!