it is unlikely that you may be pregnant. your history looks like you got your menses. the symptoms of breast tenderness and mild fever
can be there even in prementrual period. you didnot mention when you got last periods? if it is more than a month i.e one and half to 2 months then only may be you are pregnant and bleeding now as a feature of abortion
. if you got bleeding with in or at one month, it may not be pregnancy
may be it is normal cycle with passing clots. so possible prenancy is incorrect.