2 weeks of brown spotting? Help

So I've had light brown spotting pretty consistently for the past two weeks. It starting to bother me, I know it's usually just old blood that didn't come out with my period a few weeks ago, but it's never lasted this long before. I did just get over a uti just before this started,but I'm not sure if that could play a factor in this. I also had sex almost a month ago,and the condom came off in me and we didn't find it until the next morning, so I'm assuming pregnancy could be what this is, but ive never heard of this happening during that. Does anyone have any info on this? I might make an appointment with my dr if this doesn't stop soon