How do you know you are CERTAIN you want to be a physician, based on your experiences to date? (You are going to need to write about this, and speak about it in any BS/MD interviews.) Spoiler alert: This is a difficult question for many HS seniors to answer. It seems you have more research than patient facing experience (is that true?), and many successful BS/MD applicants have the reverse. If true, can you get more patient facing experience this summer? I would prioritize that over research this summer.
Next, think, really be introspective, about the college experience you want. Many BS/MD programs have onerous GPA requirements, and some still require taking the MCAT. If you attain good stats, you would have likely been a successful med school applicant down the road.
At many BS/MD programs, especially the accelerated ones, you might not be able to study abroad, work during the summers, double major/minor, or just explore your interests academically, extracurricularly, socially.
You might also research med school early admission programs (typically apply after your second year of college to med schools that your undergrad college has an early admit agreement with), perhaps those may appeal to you.