Hello wrightjw198034,
Sadly, yes, there have been patients who have failed the treatment. If you treat over 3000 patients, and we have, and the cure rate is 95% that dictates there are 150+ patients who failed the first round.
To make matters worse cure rates for GT3 are lower than for GT1 or GT2. That said, the odds are still very good – > 90% where exactly how much better depends on level of fibrosis, ribavirin and duration of treatment.
An easy way to put your mind at rest is to test your viral load – chances are this will be undetectable after 4 weeks. See https://fixhepc.com/link2labs for a < $100 source of PCR testing.
It's not unusual to have very few side effects. The usual major "side effect" is feeling better rather than worse.