4-6 weeks pregnant

Okay ladies, I got my HCG levels checked about a week ago, and it was 140 the lady told me that I was probably about four weeks when I had gotten my blood drawn. For the past couple of days now, I’ve had to wear a pantyliner, and it started off with the regular yellowish colored discharge, but for a couple of days now, it’s been a light brown/light pink tinted color. Should I be worried? Should I even bother to contact my midwife? The ladies at the office are always very rude to me over the phone and so I’m scared to call them back. I have my first appointment scheduled on March 12th, at 10:00am, right around the eight week mark but I’m so scared to wait that long to be seen but I know that when you’re this early on you can’t really see much on an ultrasound so I’ll probably just have to get my blood drawn again. Has anyone else had pretty consistent light brown/light pink tinted discharge during the first trimester? And no I haven’t been having sex as I’m so worried. Thank you