any idea what sororities will be doing spring rush

The main difference between fall and spring recruitment is that spring is a lot more causal and informal, and not all the houses participate in spring recruitment. You can always check out spring and if you don't click with any houses, try again in fall. Its not pathetic to rush as a sophomore! Usually freshmen are preferred but a lot of sophs/juniors go through fall recruitment too.

The houses who do spring recruitment vary every year, I think the panhellenic website will have a list of houses during spring recruitment in january, otherwise a lot of houses publicize through FB events so keep an eye out for that.