Welcome to the Q&A Forum

Hi there. Well, Analytics has only couple hours delay, not days, that's where I'd look. Also even Google rankings algos have some delay, so you won't really be able to 100% see how the changes affected the positions. Also look at past year behavior, if it's seasonal, you will see the repetitive traffic behavior in Google Analytics. Other than that I don't think there is anything to go by immediately besides intuition and experience. Hope this helps.