Yesterday i was putting in some laundry and after i did that i noticed 3 bits on my arm, I live with my sister and my friend and they are always biten and dont really seem to care they said they have checked for bed bugs and have found nothing and they said they wash there sheets enough, and they dont think they would have bed bugs, i am 15 weeks pregnant and freaking out, i have no idea what it is, i didnt feel anything or see anything and today they are itching so bad. does anyone have any clue what this is? HELP!