- Even if you have perfect grades and perfect exam scores and perfect ECs, it still is entirely possible to be denied admission at every single one of the Ivy institutions. That happens to lots of students every single year. So when your mom starts talking about the Ivy and Ivy-peer places, give her a big kiss and tell her that you do hope you can get into one of them, but just in case you are one of the perfect students who ends up rejected, you are going to apply to two or three places where your grades/test scores/ECs are likely to get you in, and one or two places where you know for a fact you will get in. For safeties, see this list: http://automaticfulltuition.yolasite.com/
- If you don't have a dedicated college fund in excess of US $300,000 in a safe place, then you need to know now how your family plans for you to pay for your education. Ask about that. How much are they ready, willing, and able to pay, and under what conditions. For example, some parents will scrape their pennies together to cover the full cost of an Ivy, but won't pay one cent if the kid chooses a non-Ivy.
- If your primary problem is that you have Asian immigrant parents, then do what you can to find someone who can help them better understand the US higher education system and the college application process here. They might benefit from a visit with the guidance counselor at your school who can give them a good sense of where students like yourself and your sister have been admitted in the past. Sometimes that works. Sometimes it doesn't - in which case you and your sister will have to work on your mutual support system and mastering the smile-and-nod-and-ignore technique.
- Medical school is fiendishly expensive, and admission is based on GPA, MCAT score, letters of recommendation, and medical related ECs. The name of the college or university on your diploma barely matters at all. So if you are serious about pursuing medicine as a career, your best option may well be to complete your undergrad at your own home-state public U on the cheap, and save your money (and your parents' money) for med school.
Wishing you all the best!