I Am A IV User, Sadly To Admit. But I

i am a IV user, sadly to admit. But i just started a couple months back,so i really dont know what Im doing I guess. I know its not a good thing tho. But back in Dec. i went to a emergency to have an abcess looked at on my arm almost at the bend of it, well the abcess was ok, but I had this hemotoma right beside it, so he cut it drained and sent me home with meds for blood clots (2wks) worth. However, sadley i did not stop using an IV, A place has came back but a little bigger? i cant get to doctor for 3 more days. How dangerous is that? what do i need to do?