-You can try quick warm water bath before she sleeps at night.
- check if she is fully fed and burp properly.
- check if she has any discomfort in the tummy, proper tummy time helps.
- swaddling helps a lot to calm an irritated baby.
- see if shes teething, cold teether soothes the swelling gums.
- try to distract her crying by rattling toys if possible.
- Lastly, let her know that you are there for her, try staying calm as much as possible, take a deep breath and smile at your baby eventho u feel overtired amd frustrated sometimes. :-) all the best to you.