PP. anxiety

I’m 5 weeks postpartum and for the last couple of weeks I’ve been getting anxiety and panicky mostly in the evenings/night time. Some of it is knowing I won’t get much sleep bc my little one gets fussy at night and is hard to get to sleep so sometimes I’m up til 3am trying to get her to settle down. Anyone else having this feeling once the sun goes down? I’ll find myself crying over everything and so overwhelmed and not sure why.