Bleeding means very little while using birth control. It’s a synthetic bleed, that’s why it won’t tell you anything with guarantees. You are either protected or you’re not, and if you’re not then you just have the chance of pregnancy, there is no percentage.
HOWEVER: if you miss your last pill of the pack you can treat that as your first break day, this means you need to end your break a day early too. If you don’t then the sex during your break will be unprotected. So you still have a failsafe for now.
Please use condoms or abstain from sex until you’re at a point where you take your pills correctly or when you have safely swapped methods. User error like this is the number one reason why unwanted pregnancies occur with birth control.