Thanks for your query.
There could be various reasons for your problem.
First is an impending miscarriage
When the pregnancy
is not growing normally, there could be slight brownish discharge. However in absence of pain , cramps etc, it is less likely to be dangerous.
Sometimes, mild spotting is common in early pregnancy, and is of no consequence.
, stress, jerky travel, hectic lifestyle all could be responsible.
Please consult a gynecologist and have an ultrasound
to know the viability of the pregnancy.
Meanwhile, take rest, avoid travelling and take adequate pregnancy support medications as will be prescribed to you.