Antibiotic side effect

So I started taking the antibiotic Bactrim DS because of an infection (which is like away now) but I started to feel really shaky the past like 2 days like my hands, and my head felt a little weird. So I have decided tonight to stop taking it (since the reason I was taking it like gone) the thing I want to know is if the shaking part is just a side effect? Like nothing serious will happen? Like I don’t to go to the doctor because of the side effect?