Clear blue week calculator test? Long story 👉BEWARE👈

So in the 28th of last month I went to the community pregnant center of my area. The doctor told a pee sample and got fair t positive (first picture shown). On that same day since they did not know how far along I was yet so I went and bought two clear blue week calculating pregnancy tests. The second picture is for the one on the that day(5/28). So I started this app. According to what the doctored so I conceived on but I'm not sure what day should really be the right one. Now today I took the last test shown (9 days later) now showing 2-3 weeks. So I guess to the question is how reliable are the tests? And if I could be further please comment and give me some in site please. I'm sorry if something does make sense in what I'm asking. I just hear a lot of different things about these tests. The other factor is that I had my period for two months while I was pregnant with my daughter so that concerns me to.