It MUCH better if you finish your UG education and return to your own country to complete your medical education, including residency and become a full fledged doctor. Once you reach that stature, you can apply a US physician license as a FMG and if you are successful, you can practice in the USA.
If the med schools in your country require student start their med school from UG, you may want to try to transfer ASAP.
The other way around is to merry a US citizen and you immediately will gain PR status.