So I had sex with my boyfriend October 21st so roughly 3 weeks ago and during that time I was ovulating after that I got a really bad UTI I waited to long to get it taken care of and I was in horrible pain well I am now all better.. but my period is over 4 days late. I took a pregnancy test and thank god it was negative but could it still be to early to tell? Or could my period be late  because of having a uti and being sick possibly .. like I know no one is going to have a yes or no answer to what's going on but if you could give me your best advice on what you think