I'm sending support to you and your children. You need to just work on one step at a time right now. My 52 year old uncle just passed away without warning on Aug 1st and I can tell you our family is still in auto pilot right now. I think you've made the right decision to put off the trip. With everything you and your kids are going to be going through in the next few days, weeks, months, ect. just try to remember to put one foot in front of the other, anyone who expects more from you doesn't understand how your lives have been completly rocked. Don't put anymore stress on yourself then you already have. I hope you have family and friends around you who can help support you and your kids in all the ways you will need. Understand you are justified in every emotion you are feeling right now. Just know you aren't alone.