Hello  Binuvava,
Welcome to Healthcare magic forum.
Mininmal Brown discharge or spotting can  be normally present in first trimester of 
pregnancy due to the effects of 
implantation of fetus in the wall of the uterus.Such bleeding is called implantation bleeding and is not a serious issue.
Mostly such bleeding is not accompanied by any other symptoms like painful cramps, white discharge, fever, 
dizziness, burning or itching in genitalia.If any such symptoms are present then other serious causes like 
miscarriage, placental abnormalities, genital  infection or hormonal imbalances should be ruled out.If you do not have any symptoms but still the discharge is persistent then you should consult your gynaecologist and get an 
ultrasound done to confirm the diagnosis and wellbeing of the fetus.
Please do not worry, as of now it doesn't seem to be anything serious , though you can confirm any doubts with a check obstetric ultrasound.
Wish you a healthy and safe motherhood.
Regards,