Hi my last period was on 17 aug, I usually get late by 5,7 days. On 12 sept my boyfriend and I made out,he touched his penis (which he says he just adjusted)and then fingered me, after that next day I went to a doc and she gave me meparate for 5 days,two tablets each day and some vitamin tablets. While on meparate I had feelings of nausea and felt like vommitting during nights and early mornings but it discontinued after the dose got over on 16 sept. She had told me that I would get my period after 4,5 days. I started feeling tired and low in energy so I took a pregnancy test on 20sept.(still no periods) it turned out negative.went to the doc on 21 had a urine test still negative,but last night on 21st I had light brown discharge and today it got a bit darker. What should I do? When is the correct time to take a blood test. Or is it because of the stress I am taking.