I'm sorry to hear that. To start, could you let me know how big the file is in terms of MB? And how many widgets and dynamic panels are on this page? Does it help with the toggle interactions if you remove some of them?
To further investigate this, would you be able to post your .rp file here for me to test? Please also let me know the show/hide interactions/widgets that are freezing your prototype and the browser you are using to preview. If you'd rather keep the file private, feel free to send that over to firstname.lastname@example.org. Thanks!