Dropping one course to apply for Shadowing program.

Hi, I go to U of Alabama, and I have already registered for classes worth 16 credits for Spring 2016. I will be a junior by this spring semester, even though it will be my 3rd semester due to AP credits I had.

I am a pre med, and recently got an email for applying for University medical center shadowing. While it sounds very attracive to me, I have Genetics on that particular time that requires me to attend the shadwoing.

What should I do? Should I drop genetics so that I can apply for shadowing program? Or should I do it later?

Also, I am taking:

Genetics(assuming I m not dropping)
Cell Bio
Thermodynamics
Spanish Adv Grammar
Spanish composition.

Does it look too tough?

Thanks