M 24 yrs, m vommitting,dizzy,moods swings,mucous discharge,pains in my lower abdomen,swollen gums,i was supposed 2 get my periods on d 10th bt they delayed 2 d 19th(wednesday) on that day my lower abdomen was very sore i went to d clinic they gave me metronidazole & hyospasmol...my lower abdomen still painful i went ther again on monday they gave me injection,metronidazole 400g & doxycycline...i had a pregnancy test &it negative..am i pregnant or it s a STI?