My normally independent, easygoing toddler suddenly has a big case of separation anxiety. She's 20 months, and it started last week, completely out of nowhere. She suddenly broke down when I went to drop her off at daycare (she's been there over a year, same teachers, no changes of any kind), she breaks down when I try to leave the bathroom during bathtime (it's usually daddy-daughter time/Facetime with grandparents time, so I'm usually doing stuff around the house), she wants to sit with me rather than in her chair for dinner, etc., overall she's a lot clingier. It's also focused mostly on me - she doesn't seem to worry as much when my husband leaves, and he usually spends as much time with her as I do. I can't find any triggers or reasons for this, and I know these phases can happen, so we've been doing our best to deal with it. My worry is - we're supposed to go to visit family this weekend, about 5 hours away. Because of various scheduling/housing/space limitations and grandparent health issues, we normally split our time - she stays with my parents and me for a day or two, and with my husband and his parents for a day or two. We don't go to visit often - this will be her 3rd time - and with this new anxiety, I'm really worried that she'll have a hard time if I try to leave her with her dad/grandparents. I'm even more worried that because it's not a very familiar environment to her, she'll be more stressed out than usual and that it'll make her anxiety worse (possibly not sleeping well, making the clinginess worse after the trip, etc).

Am I overthinking this? Is there a good way to approach this anxiety, especially in the trip context? It's not a must, we can cancel, but I don't want to overreact unnecessarily. I could keep her with me the whole weekend, but I know my in laws are going to feel shorted so I'm not sure how to approach this.