Glad the horrible symptoms took a hike!!!

Yes, Im gonna be pushy here. You need to set up a schedule with the manager to come give you a break. I know you are tough, I know you are stoic. BUT you are entitled to a reasonable break later for the bathroom.

PLEASE consider scheduling a break time later with the manager to cover you. Same time everyday. ANd take it even if you think you don't need it. Your body will thank you.

When I worked warehouse, I always headed to the bathroom at breaks, no matter what.