Well, my only advice is to stick it out, but at this time you are pretty early into pledgeship so if things are bad now, just imagine them slowly getting 100 times worse.
They do it slowly so you won't suddenly want to quit. You keep the mentality that: "Well shit, I've come this far, why give up now" You will repeat that to yourself everytime you consider quitting, and trust me, QUITTING WILL CROSS YOUR MIND.
The whole point of pledgeship is to weed out the ones who don't 100% want to be an active. Sure lots of people want to be in a fraternity but not all can make it through pledgeship.
Try your best to keep your grades up or you will DEEPLY regret it by the time you are a senior and your freshmen GPA keeps coming back to haunt you and fuck over your overall GPA. Make use of the study halls. But the most important bit of advice I can give you is that:
Pledgeship is one big MIND FUCK. Don't lose your mind over this bullshit, keep a sense of humor,don't get mad, just laugh inside. (but certainly don't crack a smile on the outside)" They want to get to you, they want you to lose your fucking mind, don't let them get there. Always remember that they obviously like you because they gave you a bid so don't fall for the hatred that is rained down on you. Its all a big joke, keep a sense of humor and you will make it just fine.---Also, look at some of the dorks in the fraternity and remember that if they did it, so can you.
Best of luck.