Help!

I'm 4 1/2-5 weeks and almost 3 hours ago I went to the bathroom and there was a decent amount of brown in my underwear and when I wiped there was some very light pink. I wouldn't have been as scared but I've been having really bad cramps for over a week, I thought it was normal but now I'm not so sure. I called the hospital and they said as long as it doesn't happen again and my cramps don't get worse then I will be okay until my appointment Monday. This is my first so I'm just really worried about it! Has anyone else had this happen to them? What was the outcome?