brown discharge at 15 weeks!!!any idea???

an
hey hi all,I just stepped into 2nd trimester but having brown tinted discharge while peeing.I know I have very low lying placenta and I am bleeding off and on through out this 15 weeks,the baby is fine when we last checked.
do any one experience this kind of discharge?please give me some emotional support and suggestion.doctor put me into bed rest for uncertain time limit 😞😞😞😞😞