Hello, I recently changed my classic two-component contraceptive pills with ethinyl estradiol to Drovelis pills. I didn't have any bleeding in 1 blister of tablets, which I'm just finishing. I only noticed breast pain and enlargement (greater pain in the evenings) and lower abdominal pain, especially in the middle of the blister. I will add that this is my 3rd blister without a break, because before changing the tablets I combined 2 blisters of my previous Belara tablets and immediately after finishing the 2nd blister I started a non-stop 7-day new Drovelis tablets, at the end of the 2nd Belara blister the breast pain was unbearable even though before when I combined the blisters if it occurred it was normal. After changing the pills, the pain became bearable. I didn't skip any pills, I took other medications as usual (pregabalin for neuralgic pain and occasionally NSAIDs, e.g. ibuprom), I additionally protect myself with a condom. Can it happen that bleeding does not occur at all in this cycle? Can it be ruled out that the lack of bleeding means pregnancy?