Lower back discomfort

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So I got tested for a uti and it was negative. I went to the doctor and they don’t believe I have a yeast infection or any kind of vagina infection based on my symptoms. I just got off my period a few days ago and it’s been a week of having this lower back discomfort. The discomfort isn’t bad at all but I’m just tired of dealing with it and ibuprofen hasn’t helped. Any ideas?