welcome to HCM
mostly patients while explaining there problem forgets to give there full details like you haven't mentioned about any contraception
you are taking and other symptoms are you feeling and any sort of unprotected sex you had and its durations when you had it?
the green things on your chest is dilated superficial veins which also dilates in pregnancy
. and the missed periods with brownish vaginal discharge
is due to endometrial implantation
by fertilized egg. now mostly patient mentions that they gets negative pregnancy test result. the reason for that is they do the urinary strip pregnancy test which gives positive result after two weeks of the pregnancy. before that it will give negative result. the more accurate result is obtained by a blood test
that is known Beta HCG which gives positive result from the 1st day of the pregnancy. so to get accurate results i would suggest you to perform Beta HCG test.