Hey hon!
You get through the next few weeks by having a sketch of a plan, so that you aren't winging it every day. That doesn't mean a rigid sequence of meals, but it does mean knowing some ways you can go without doing too much damage. For example, think about what good choices would be when you go out to eat. Think about foods you can cook that will please others but not throw you into the gravy.
Stock up on snack foods that you can eat to avoid the heavy stuff. Things like that.
This time of year it's about damage control.
I would encourage you to see a podiatrist about your foot issue. Don't just hope it will get better. Foot pain can be serious, and the sooner you find out what you should do from a doctor, the better it will be.
Hang in there!
Jay