Oregano tea at 8 weeks

Hey ladies

I’m freaking out! I been having a lot of throat phlegm and I asked my mom what is good to take herbal since I’m pregnant. She suggested oregano tea which I drank a full tea cup. An hour later I read up on it , & it causes miscarriage. I’m so scared we tried really hard for this baby. What should I do? Go to the hospital? I tried throwing up a much as I can. I feel a dull lower back pain ... ugh I should have waited to see the dr.. any suggestions???