Pananakit ng puson & dark brown discharge

not normal mie ganyan nangyare sakin ngayon brown discharge at naghihilab tiyan, matigas palagi tiyan ko at nadadalas sakit ng likod at lower part ko, kaya binigyan ako ni ob pampakapit, pampahinto ng hilab at injection 4dose ng pampamature ng lungs ni baby. I'm currently 34weeks palang kaya di pa safe lumabas si baby. Baka mag preterm labor kaya madami binigay si ob kaya kaw momsh better consult your ob dapat kc white discharge lang lumalabas satin.