When switching from portra 400 to gold 200 I forgot to change the iso for the first 5 frames .
Would those 5 frames (that were taken at 400 instead of 200 ) be in good condition after developing for 200?
It sounds to me that you've exposed 5 shots at ISO 400 , and the rest at ISO 200 .
So from a development point if view , it's irrelevant if the roll was shot at different ratings .
The whole roll will be developed for the same time regardless , it's not like it's sheet film where each shot can be developed differently .
As others have said , the film will come out fine anyway .
I've used cameras without a meter and had to guess exposure . The settings I've used will likely have had at least a 1 stop variance from ideal and all come out fine .
So don't worry .