8 weeks pregnant and bleeding with no pain?

So Basically I am 8 weeks pregnant, will be 9 weeks in 3 days, and a few hours ago i noticed some brown discharge with a tiny bit of pink and now I have a pad on, there are about 3 or 4 brown spots on it and I have not had any pain or cramping as of yet
I called the nhs directline, who just said to call the doctor asap tomorrow and if it gets worse to call the out of hours doctor.
I’m so worried I might be about to miscarry
has this happened to anyone before? and what was it?
P.S- I don’t know if this will help, but this would be around the time my period is due aswell