You have been diagnosed for an infection and have been advised a course of antibiotics to kill the infection.
The dosage prescribed to you is suitable. It would be best to visit your doctor and discuss your condition with him/her, as some times we need to increase the duration by a few days when the infection hasn't been completely dealt with.
Adding a probiotic
to the equation would be a good option, as it would promote in stool formation. You could discuss this with your doctor as well.
I hope this information has helped.
Wishing you a speedy recovery and a good healthy life thereon.