Can antibiotics (bactrim) make your period lighter or first time intercourse?

By Anonymous February 26, 2013 - 10:38am

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Hello!
and sorry if this is too long but im concerned.
on Feb 20th, 2013 I had my first sexual encounter with my boyfriend, he used condom and pulled out way before he ejaculated, of course I bled a little and for the next 3 days but it was brownish and redish nd it was just like a few drops and I also got a UTI so on sat 23rd I went to the doctor and he gave me antibiotics smz/tmp 800mg/160mg or Bactrim to treat my UTI...the next morning on Feb 24th I felt sumthing come out nd it blood bright red so I thought my period came since my ovary was hurting a little..its been 2 days since the 24th nd im only spotting bright red blood, usually I have heavy periods nd this time is just a little bit...I was stressing out that maybe I was pregnant but I shouldn't be because we took precautions. I was diagnosed 6 months ago with Polycistic ovary syndrome but it was treated nd my periods started being regular so I don't think is that. why do you think this happened please help!!!! I haven't taken a pregnancy test yet im scared im only 20 yrs old, I don't want a child and my parents would kill me.