I just started taking a generic Zoloft (sertraline) today and my chest hurts and im afraid if I get up ill fall over. Is this normal for the first dosage?

Probably not zoloft (sertraline) Zoloft (sertraline) takes days--even weeks to start to work your symptoms are likely due to the anxiety disorder you are trying to treat hang in there with the zoloft (sertraline) & give it a chance to work.
No. These are possible side-effects, but they don't usually happen, ie, it's not "normal". Talk to the doctor who prescribed it — you may need a lower dose, or maybe a different medicine. In the meantime, drinking plenty of water (and getting up slowly) sometimes helps the "i'll fall over" feeling.