uncertain

I posted last week about a bfp and received so many kind words helping me decide if it was really a bfp or not. I have taken a few other tests and some have been positive and some negative so I'm not sure what to think. The positives are faint, I am using the same brand test for all first response early response. I am now 2 days late for AF and experiencing Uti or bladder infection symptoms. I'm not sure what to do or if taking over the counter medication is safe being that I'm not really sure if I'm pregnant or not. I have an appointment Monday but until then I will be miserable. 
Any help is great help you ladies are so supportive!