Antibiotics? Stress? Pregnancy? Why am is my period late??

[Stopitgetaway]

I'm currently in HS and I must admit that my bf and I have had unprotected sex and was mainly relying on the pullout method (he's really sure about it) but stopped and started using condoms last week (July 10). I was expecting to get my period the next day (July 11) but it still hasn't come until now, it's been 6 days already. I've been stressing and crying about it for 3 days now since I'm still so young and scared. I haven't felt or noticed any signs of pregnancy or pms either. Note that I had UTI 2-3 weeks prior and took antibiotics for an entire week, I heard it could affect it. I'm just worried about why I'm so late... could it be stress? antibiotics (fully healed, don't take them anymore)? or could I be pregnant?

UPDATE: I was just advised on another site that it could be the antibiotics I took during the week I ovulating and the fact that I've been overly stressing over it. They said since I didnt feel any symptoms it could be possible. I have no discharge either. I'm getting a pregnancy test tomorrow.. What do yall think? I'm so scared, Sex Ed isn't even given in my country and pills, condoms and such are condemned and aren't readily available unless you're 18+ or sometimes 21+. I'm 17 and have been relying on the knowledge we've collected online and are trying to make the best of what we're given. Please help me

[AnnieBrooke]

Well, stop crying until you take the pregnancy test. And no more "pulling out," it is not effective. Take the test and write back with the results. Follow the instructions, don't use mid-day urine (only first morning urine that is concentrated) and don't read the test after the time period named. Good luck.