If you miss 3 or more pills in a row..can u become pregnant in those days even if you started bleeding after?

Usually I'd say yes there is a chance, but since you've started bleeding and have been for 2 days now, I'd say your safe. You'll need to be more careful in future if you want to avoid a pregnancy, you should also use condoms anyway, cause pregnancy isn't half as bad as getting aids, or other std's.