Covered in red spots

Hello just on here to say ive woke up this morning with some sort of rash? My hands and sorta my forearms as well as my feet are covered in this red dots all over there tiny but there is a lot, my family have had some sort of virus or cold the past couple of days which i guess they passed down to me, i had one night where i felt ill, but brushed it off the next morning with only keeping the snotty nose and rubbish cough, but its about two days since that and ive woken up with the spots as well as getting some hot flushes throughout the day. none of my family have had the rash though with the cold so im just wondering why i have it and if its anything worth worry about, but yes covered on my hands and feet. is it just from the cold. thanks