I agree with @andreytcho. You can buy everything you need from Bulgaria (may be with a little help from a friend about where exactly you can find it that will save you time). And if you're obsessed with a specific brand of food (cookies) or clothes that can't be found in Bulgaria you can always order those things from ebay or amazon.
But still I can understand your worries. Living abroud is stressful in the beginning and you just want to be safe and secure surrounded by your own things and belongings that will make you feel at home.