I was laying in my bed and I felt a smal like tingle on my hand and I looked down and saw a small little black bug. I tried to pinch it and it got away.. then again the same thing happened.. felt like it had a hard shell and I don't know what it is.. maybe flea or bed bug? I don't think it would be a bed bug cause I wash my sheets and pillowcases all the time and I have a matress that is only about 3 months old. Now I live in a house with 4 sepereate appts. In it. The people below me have a couple cats and the people upstairs beside me have cats. I guess the people below me have taken is strays and have had fleas in their apt before. Can fleas come through air vents maybe? If anyone could help it would be much appreciated