Hi there kierra198,
We understand it's important to not lose your place when shopping. We'll be glad to assist you.
To start, please check the settings on Safari using these steps:
If Safari is slow, stops responding, quits unexpectedly, or has other issues
If Safari doesn't load a page or webpage items are missing
Please try restarting your restart your Mac in safe mode: How to use safe mode on your Mac
Safe mode prevents your Mac from loading certain software as it starts up, including login items, system extensions not required by macOS, completes a basic check of your startup disk, and clears cache. Test Safari at the websites where you're experiencing this issue while in safe mode.
We look forward to hearing back from you with the result.
Stay safe!