Brown/red blood

Davina
Hi ladies. I'm freaking out!! I'm 12w tomorrow and have my US on Wednesday. This morning I've got up and had brown discharge, now it is brown and is red blood tinged :( I've called my midwife and she said it can be normal. I'm terrified as I had a MMC last year. I had an US at 10w and everything was ok with a good strong hb. I just don't know what to think :(