You don't HAVE to stop using condoms after seven days, that's just the earliest you can. If you feel more comfortable using condoms for the whole first pack, then go ahead -- in fact, you can ALWAYS use them if you want to.
After seven days of taking the pill on time, without any interfering substances or vomiting afterwards (ie perfectly), then you are fully protected. But again, you can continue to use condoms for as long as you wish.
While many women DO experience side effects on the pill, not all do. And you are on a very low-dose pill, which means that there is likely even less chance for side effects in many cases.
I'm sure it is working perfectly well.