Go run a PFT. Measure your height and weight, and if necessary, get a body fat measurement to ensure you are within standards. If the numbers are right, and your uniforms are still serviceable and fit properly, then what questions are there?
Something just does not smell right here. Call me what you want, but it seems very strange that you, an "Officer of Marines" does not seem to know what the basic fundamentals of being a Marine are.
During my 15 years, 4 months, and 1 day of active duty with all four Air Wings, and a 1 year attachment to Security Forces Battalion Pacific at Mare Island, successfully completing the SNCO Basic, and SNCO Career courses at Camp Geiger, and having a Marine that worked for me go on to finish his degree and become a Logistics Officer........I have never heard of a single instance of a Marine with broken time having to repeat any portion of basic or advanced training upon rejoining the Corps.
I know it has been nearly 2 years since I separated, but I will find it remarkable if things have changed that much in such a short period of time.
Semper Fi