Traveling internationally

So, my husband has a work trip next week to Sweden and Iceland and I agreed to go along since the hotel and his flight are paid for by the company so it’s a great chance to take a trip to Europe inexpensively (just had to buy my plane ticket). But the closer it gets, the more nervous I get. Sawyer is still exclusively breastfed (meaning no formula and has only had bottles a handful of times when my husband and I have gone on date nights). He does eat purées and some finger foods as well. He’ll be 9 months on Feb 6th (we leave Feb 5th). He still wakes up all through the night too. I know he and his sister will be in excellent hands with both sets of Grandparents watching them but I’m still nervous. ?