@zoopydoopyy_ the pull out method doesn’t work. Precum can contain live sperm and is unavoidable if you’re having sex. Live sperm can still enter you even if your partner doesn’t ejaculate inside of you. If you’re anxious about pregnancy you really should be using condoms. Put your mental health first. It’s not worth the stress.
I do want to address bleeding though. Birth control is known to lighten and stop bleeding. You’re also still in the adjustment phase so your bleeds might not line up in the way you want it to. Irregular bleeding is also a common and normal thing. Either way the bleeding you may experience would be synthetic, it’s not an actual period and while a heavy bleed would be a decent indicator it can’t be used as a “checklist” in regards to pregnancy. Only a test can tell you.