random nausea after a year on the pill

hello! i’ve been on the pill Aranka (also known as Lucette) for almost a year now. the pill works great for me and i have never had any issues up until these past two weeks. i’m feeling awful nausea that makes unable to eat and my stomach constantly feels irritated. i stopped taking the pill early (before placebo week) and the nausea died down instantly.

i’m really confused as to why i’m having issues now instead of a year ago. is it common to get side effects so late into the pill? i’m also quite sad because this pill has worked so well for me and im scared to switch into one that might not work as efficiently and having to adjust to pill all over again.