Scared :(

MomOf2 β€’ Married πŸ’ DD:4yrs old πŸ‘‘ Angel Baby 5/6/2014 πŸ‘Ό My Rainbow Baby! 5/21/2015 πŸ‘ΆπŸΌπŸ’™
So I was wondering if brown discharge is normal? I'm only 5-6 weeks but I have been noticing that whenever I'm really active, like walking around, going up and down stairs, etc-- I get brown/pink tinged CM, I'm kinda worried since I had a MC in May. :/
​I haven't been having sexual intercourse for the same reason since I got my BFP.
​Today I emailed my doctor and she sounded kinda alarmed, and said she needs to see me asap. :( 
​I'm scared.