<s>[INST] I had sex last month on march 11th. he pulled out.  was like five days after my last period.  then this month when my period came it was abnormal.  very light first day and half, didnt need pad. then just like a couple hours of really light flow. didnt even fill one pad. then just a rust brown discharge for like two more days.  my period always gets really heavy.  tested but came back negative. am i in the clear.  only other thing is that i feel drained and tired and sometimes get a little queasy after i eat, but not a lot.  never had a period, if it was one like that before, and dont know if im just freaking myself out or not? [/INST] Hello, Here, you need to undergo one blood test for beta-ChatDoctor & TVS scan to rule out implantation bleeding at the earliest. It is mostly presented with brown discharge. Early pregnancy test is less significant. Other reasons are vaginal/ pelvic infection, hormonal imbalance, old endometrial tissue, over wt/ loss, thyroid disturbance, ovarian cyst, irregular diet habit, stress etc. Following above test report, you need to consult with gynecologist to undergo other relevant investigations to pinpoint the diagnosis. Take suggestive measure accordingly. Good luck. </s>