Worried about light brown spotting

Went to the restroom at work today and noticed a bit of light brown dried blood on my panties. Also, have been having some mild cramping today. I am 5 weeks and 1 day. Just want to make sure that it’s normal or not. This is the first time I’ve had this since finding out about my pregnancy ! Thank you for your help! I plan to call my doctor Monday, but not sure if I should wait that long or not😊