Side Effects

So my colon has been spasming for a week and my doctor prescribed me this medicine caused Bentyl. I took my first dose yesterday morning, and then one last night and one this morning. I have had the worst side effects ever. I’ve been too dizzy to stand, my head hurts, my vision is blurred, and my arm won’t stop twitching. I went to a clinic and they just said to stop taking it, but it hasn’t worn off yet. This is the worst I’ve felt in a while- I just don’t feel like myself. Not to mention all my finals are due this coming week. Anybody relate?