Hello~You need to take the full course, the doctor would not have prescribed it for you in that amount if he/she did not think it was necessary to take for that length of time. When an antibiotic is stopped before the time is up, the germs can return and stronger as well.
Why did you only take 3 per day? what was the dosage - are you sure that since you only took 3/4 of the dose per day, the condition you had has been completely eliminated? You should talk to your pharmacist or doctor for the correct solution to dispose of the rest of the pills. Do not save them for another time - there are only enough left now to cause the next disease organism to develop a resistance to them and then you are in a bad way then