Combination pill and pregnancy !

Has anyone ever got pregnant while on the combination birth control pill?!!! This is my second month on it. If I forget a pill one day I usually bleed which reminds me to take two the day I bleed. Well at the beginning of last week I dropped one of the pills down the drain!!!! I freaked out told my SO and we used extra protection until a couple days later once I got back on schedule. Yesterday was supposed to been my placebo starting week. And I usually come right on and I haven’t just cramps and back pain. Still nothing today! I’ve never been on pills and don’t know if this is normal. And my pills are the Junel 1.5 mg. I take them for 3 weeks and skip 1 week and start back btw.

No NEGATIVE comments please. It’s just a question!