Brown discharge 4 weeks pregnant

I have had light cramping for a little while and brown discharge... I’m unwell anyway with a bug that’s going around , but is this normal ? It’s not pink or red it’s light brown 🤷🏽‍♀️ I’ve been to my doctor, and she’s happy with all my observations and that but she didn’t take blood ... my progression lines on my tests are as dark as the control line so my hormones are doubling each day ....