can i stop taking prilosec before the 14 days i was told to take it?

i’ve been using omeprazole for 5 days now for acid reflux and i’ve had stomach pain, dizziness, and headaches. if these side effects persist should i stop taking it? 

I guess they never did an endoscopy and they just came to the conclusion you have acid reflux and order the pills, right?  Skipping a day or 2 is going to do much to you so I suggest you call your Doc tomorrow and just put on hold your next dose.  Now, if you had these symptoms (reflux symptoms) for a long time I suggest they do further testing but just don't stop taking these pills and do nothing. ;-((  God bless!

my doctor prescribed these to me because my stomach was producing more acid due to the stress of surgery i had in october for appendicitis. what happens if i stop taking them?

I'm not a Doctor, but skipping a day or 2 is one thing, not taking them for that reason is another.  You need to call your Dr tell him the side effects. He will probably change he medication.