18 wks spotting/bleeding

I am 18 weeks exactly today. This is my 3rd baby, 5th pregnancy. I woke up this morning to streaky red discharge. Its been continuing, but not worsening. I have not had sex or had any type of exam. Some cramping but not intense. Im concerned but of course as its the weekend, my drs office is closed. Should i get checked out at the ER or no?