what are these larvae I keep finding?

ugh so the last couple of days I've found 3 little worms (two crawling on my shoulder on the couch and one on the table---ugh!) and I thought they were maggots but I just found little cocoons in my (closed but not zipped) Nook case!!!! What the hell are these things and how do I get rid of them?? We've found an assortment of colors, the first one was white, the next was green, and the last was brown (maggot sized though thinner). The cocoon clearly has similar larvae in them.