First of all, do a blood test
for beta hcg & USG lower abdomen to exclude intrauterine pregnancy
as early home pregnancy test may give false negative result. Brownish discharge may be due to implantation
bleeding or vaginal infection
(bad smell indicating).
If you get negative result again, then other reasons are hormonal imbalance, stress/ anxiety, thyroid problem, wt gain/extreme loss, irregular eating habits etc.
Do some investigations to rule out underlying pathology like Thyroid profile & other hormone assay, Vaginal swab test & urine examination. So consult with your doctor and take suggestive measures.
Tender breast is due to progesterone
hormone. Use tight breast support for discomfort and take prime rose cap. Antibiotic therapy may be needed to cure vaginal infection. Avoid stress, take healthy diet, control body wt and maintain genital hygiene properly.
If you need further consultation with me, then you can visit http://www.healthcaremagic.com/doctors/dr-soumen-patra/63326.