Congrats, Helen!
I know how much you've been looking forward to this day - must be a huge relief for you!
I have no idea what the exact terms of your medical would be - I'd expect it to be written clearly on your medical, but failing this, I'd clarify with the examiner. Many PA28s are pretty much identical to fly, but not all - the PA28-140, for example, has the trim handle in a completely different place to the 161, so I could understand it a new checkout was required for different variants to ensure that you're able to reach all of the controls comfortably.
Have you soloed yet? Would have been perfect weather for it this weekend.
FFF
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