Can spotting occur at the end of the blister when using birth control pills?

Up to @Anonim:

The onset of bleeding earlier than usual is unlikely to be caused by anemia. However, if it also occurs in subsequent cycles, you should consult a gynecologist.

If you are unable to consult your doctor, you can use the teleconsultation here:

https://www.gdziepolek.pl/telekonsultacja/z-ginekologiem

Hello, I have a lot of anemia due to iron deficiency, ferritin also came out poorly in tests, can it affect mid-cycle bleeding? I have been taking birth control pills for 3 years, on the 20th day of taking the pill I got bleeding, which is a few days too early, is this normal in my situation? I don't take any other medications, I make sure that the pills are taken at the same time and I didn't skip any. Previously, there were mid-cycle spottings. He has been taking iron for almost two weeks, could this be due to the changes that are now taking place in the body through iron replenishment?
At the last visit, the doctor said that everything was fine in terms of gynaecology and the pills worked, the visit was a month ago.