Pregnancy tests

Hey everyone I have a question I am worrying myself so bad cuz I read all about the chemical pregnancy tests and what not. I went to the dr. Thursday for my annual she did a pregnancy test said it was negative I was thinking about it all day and said no I just feel different took a hpt (fr 6 days before missed period one) my period was due Sunday and I was 9dpo at the time of my first tests. It was very very very faint but there. I took another test in the morning even darker then took a digital said negative then took another regular test darker then the morning one. Then Yesterday I took a morning which was the same darkness of the evening one. Then today took another one and is a little darker not too much. Should I be worried about the lines? I'm so nervous and just need some reassurance or what should I do. Here's my last three tests.