Should I take plan B

Grace

Okay so I’ve been on the antibiotic Doxycycline hyclate 100mg capsules for a few days now. I asked my doctor if it would mess with my birth control and he said no. So last night I had sex no condom and he pulled out. However after we had sex I looked up if it messes with the birth control I’m on and Google said it can mess with your birthcontrol now I’m freaking out that I’m gonna get pregnant. Do I take a plan B or am I fine?