Adjustment of Status - I-485

Hi everyone,

I have my green card interview next week, and I have a question regarding I-693 the medical form. I had my I-693 signed by a surgeon in November 2017, and I submitted with my I-485 application in December 2017. When I submitted my I-693, I used 02/07/17 edition. I know that starting January 2018, civil surgeon must use the 10/19/17 edition, but because I submitted my form before January 2018, would my 02/07/17 edition still be valid? My understanding is that if the surgeon signed form I-693 no more than 60 days before you filed I-485, the form I-693 will be valid for 2 years, so my case, it is still valid. But the old edition and new edition part confuse me. I am not sure if I should go ahead and get a new medical, because it costs a lot...

Please give me some advice if you have any:)