We appreciate the sensitive nature of this question.
1-2) There is not much to do with the swab beyond trying to make sure that it is done gently and to avoid looking at the swab itself after removal. You can also wear a white pantyliner after the swabbing and continue to use white pantyliners through the end of the
clean days. We follow the position that pantyliners are a surface
not halachically susceptible to stains, so you may disregard any stains you find on a pantyliner.
3) You need to do one
bedikah sometime during the day on Shabbat. You may omit further
bedikot ;until then.
4) The gel inserted at night does not raise an issue of
chatzitzah.
5) It is possible that you are more prone to infection at specific times of month. We recommend that you raise this and any other medical concerns with your physician.
We wish you a
refuah sheleimah! Please be in touch with any further questions.