I HAVE BEEN TAKING CEPHALEXIN 500MG NOW FOR 8 DAYS MY UTI SEEMS TO BE GONE, HOWEVER I HAVE 2 DAYS LEFT OF MEDS.I HAVE DEVELORED A REALLY BAD RASH UNDER THE ARMS AND IN THE GROIN. ALSO HAVING NAUSEA, AND DIAREA.iS IT OK TO SKIP THE TWO DAYSOF MEDS AT THIS POINT?