@jussnunu take a breath. It is so difficult at this moment is stay calm and not let you mind reel. When is you oncologist appointment? Soon I pray, so you can get mind calmed with known information. The OB-gyn may or may not have the full information. The oncologist is knowledgeable in breast cancer. In the mean time write questions and concerns down, which hopefully will help alleviate them out of your thought process and on to the paper.
Please be vigilant and insist that you get an appointment quickly and soon. Do not just let them say "your appointment is such and such" You speak up an say you need it sooner. Do you know this oncologist. Ask friends or others about him/her. You are young & healthy and that is a real plus for you. Hang in there and we are here for you. As you think of questions - please do not hesitate to write the questions here in this forum. We are in this journey together and have each others backs, Someone probably will have an answer and explanation for you. Be proactive and don't stop asking questions of your doctors until you are satisfied and comfortable with the information. Your OB-GYN I think did you a dis-service by giving you partial information. IMHO Blessings