If you only shadowed for a day or two, it is hardly significant experience, post-high school or not.
Everything you put on the application you can be questioned about at an interview, should you get one. Frankly, if I were an interviewer I would consider a few days shadowing beyond insignificant. But luckily, I am not an interviewer.
You are not required to have a long list padded with trivialities. Stick to a few things you were really involved in and can really talk or write about if challenged.
You must have heard the expression "quality, not quantity."