Antibiotics or Pregnancy?

Question

So I had recently gotten a UTI so I started taking the antibiotic nitrofurantoin to treat it. I’m on the last day of taking it and my period is 2 days late. I typically expect my period to be late, but it’s starting to get me worried because I’ve recently become sexually active and I’m a big worrier. Is it true that antibiotics can delay your period? 
Follow up question: last week at the doctor’s I gave them a pee sample to test if I had a UTI. From that sample, could they have easily determined if I was pregnant? The last time I was sexually active was 2 days prior to that.

Answer

The tests for UTI are not the same as pregnancy tests, so unless the doctor was specifically looking for pregnancy and tested for it, they wouldn't show a pregnancy.
It could be that the UTI itself delayed your period, or the stress associated with it. I however have never had a delayed period while taking antibiotics for a UTI. And I get UTIs a lot, have even been on IV antibiotics for them and my period showed up on time. 
I suggest if you are that worried, to go ahead and take a pregnancy test.

Answer

Antibiotics can reduce to effectiveness of birth control so depending on how long the course is and whether or not you had sex while you were ovulating, you could possibly be pregnant. Antibiotics can stuff with your cycle though, and so can a UTI, so you could be late. 
You can take a test and see. That’s the only way you’ll be able to put your mind at ease.

Antibiotics or Pregnancy?

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