You can find almost everything in Qatar that you would find in the US. Don't weigh down your luggage as there are so many expats here that stores carry many American and UK products. There is a grocery store in The Center behind Dairy Queen that will have what you need. And in terms of household items, there are many beautiful stores in Qatar to purchase sheets, kitchen appliances, etc. as well as many stores that have beautiful clothes.

Have a nice trip!