Brown discharge

Hi ladies, 
​I'm 8 weeks exactly today and last night I had some brown discharge in my knickers, I haven't had any today so far.
​Bit worried because I've been having mild-ish cramps for the last few days and had a miscarriage at 5weeks in April. 
​Today is also the day I would have started my period if I wasn't pregnant, do you think it's something to do with this?
​Thanks x