Yes, your life will be hectic over the next few days. Yes, having guests and eating healthy is a challenge. Yes, there will be even more cake at the toddler's birthday. Yes, you are exhausted and eating helps you stay awake. Yes, next week is your surgery and you're nervous. Yes, you feel bloated and disgusting but eating more doesn't solve that problem.
All of these things do NOT make it OK to just eat for eating sake. Get your butt to the gym tomorrow and get back to routine the best way you know how. Keep trucking along and making good decisions. Just as everything, this too shall pass.