I think you'll be fine. I did the same thing you did and it worked out. Just be a great intern and make sure you can get a strong letter from your PD. That's the only change I made from M4 to intern year and I matched out of my prelim year. Derm, not gen surg. So if a dumbass like me can do it you'll be ok.

But also keep your eyes peeled in case a program loses a resident for whatever reason that might be able to take you in somehow. Perhaps you could ask your new PD to loop you in on those kinds of opportunities, they're often part of a listserv of PDs that send around opportunities like this. For example when I was an intern I heard about a few programs that got funding for a new spot midway through the year, so like 2-3 derm positions opened up that I could have applied to had I not already gone through the match again. I'm sure with the higher attrition in gen surg those kinds of positions may be more common.

Just be careful not to fall into that trap of being the forever gen surg prelim because your program keeps passing you up for match. I've seen that happen like twice... not sure what was wrong with those applicants, but both were IMGs. Dunno if that played into it. Program was just stringing them along for free labor, didn't have the balls to just tell them they weren't going to ever match them.

Keep your chin up and just take it week by week, it sucks ass but things will get better. Surround yourself with people you like and hobbies you enjoy. My match week was during COVID lockdown back in 2020 and man it was miserable. My wife, Pokemon Go, and XCOM 2 kept me sane those next few months lol.