Mate, it is totally normal for little ones to be like this much of the time, if not all the time. It might be that after whatever is going on now resolves itself (and teething & separation anxiety are quite common at this age), she will go back to how she was. Or it might take longer. It's just the way little children are - they need their mummies.
^^^^ yeah that
DD was such a velcro bubba at that age. Refused anyone else putting her to bed for 7 whole months and I would rock and pat and rock and pat. It will pass, hun. Just breathe and hang in there until it does