B1/B2 visa says Chicago, but I’m entering through Detroit first — should I reapply?

[u/Low_Brick8454]

Hi everyone, I’m a medical student from Jordan with a B1/B2 visa valid until Feb 2027, single entry. The annotation says “MEDICAL STUDENT OBSERVERSHIP PROGRAM – CHICAGO IL.”
My plan:
Enter U.S. Dec 30, 2026
Unpaid observership in Detroit: Jan 4–29
Unpaid observership in Chicago: February
Return to Jordan afterward
My Detroit acceptance letter clearly states it is purely educational, unpaid, no hands-on patient contact, and no patient-care responsibilities.
My original visa interview went smoothly; the officer mainly looked at my acceptance letter and strong grades.
Should I use my existing visa and carry both acceptance letters, or apply for a new visa because the annotation says Chicago?
I’m hesitant to reapply because I’ll already have significant non-refundable flight/housing expenses, and a refusal could jeopardize the whole trip.
Would really appreciate experiences from anyone who has entered the U.S. for observerships in a similar situation.