What should I do about my Lab T.A.?

I'm in a Geology course, & I'm having a problem with the TA that teaches this lab. There isn't another lab to go to, so that option is out. I'm afraid to say anything- I don't want to be "the complainer" and risk her not helping (she already doesn't much). She treats me like I'm an idiot, and is quite rude to me- esp'lly her tone. In the last lab, she said, "that was on the midterm- you should know all of that." This was right before she helped 2 younger, male students (I'm 35) & basically GAVE them the answers. I go to all of my cles, labs, read thru my book and labs (many others don't), and I take notes in all my labs (most don't, either). I admit that I have never been good at science & math, but I really, really love Geology (this is my 2nd course in it) & I want to understand. I have been trying to find a tutor, but with no luck. I'm not the typical younger student who screws off, etc. I've come back to school, and I wk. really hard. I just can't put things together when it comes to sciences, and she will not help me. I don't want to be a "tattle tail," but I'm paying a lot to go back to college. What do I do? Do I say anything...if so, what, and to whom?