Hello,
Brown discharge is completely normal and natural at
puberty. The brown color means that there is slow bleeding from your uterus, unlike when it's bright red and flowing faster. In many cases, brown discharge is old blood that's taking extra time to leave the uterus. However, since you are getting stomach ache get clinically examined by a gynecologist / GP to detect any infection ( yeast inf / BV, etc), get
urinalysis (R/E and C/S ) to detect E.coli, UTI, etc. You will be accordingly treated.
Maintain hygiene, wear soft cotton clothes and undies. Take regular bath. Brown discharge is watered down by your normal
vaginal discharge or even by semen, it may look light brown. If you are sexually active and have a new partner, consider getting a STI (sexually transmitted infections). For headache, take
acetaminophen one stat when needed.
Dehydration also causes headache, stay well hydrated. Take plenty of water. For relief of stomach ache take anti spasmodic and antacids.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K., General & Family Physician