If you have been taking your Qlaira correctly it is very very unlikely that you are pregnant.
About 1 in 6 women taking Qlaira do not get their periods when they are on the pill.
The sinus medication
will not react with Qlaira in any way, so do not wory about it.
If you do not get your period for 2 months, that is if you miss in november as well then just do a home preganncy test and then continue the medications.
It is very unlikley that you are pregnant and need to check only if missed 2 months in a row.
Hope this helps.