Confused

So I’ve had 4 positive pregnancy tests over the span of 2 weeks! I went to my doctor this morning to confirm the pregnancy and her test was negative. I’m confused as to why as I should be 6 weeks this Friday. My last period was on the 5th of April and I got my first positive on the 6th of May. My last positive I got was last Thursday 11th May. I’m just looking for some advice as I’m really upset over the appointment and my doctor didn’t clear up anything for me just said I’m too early for it to show up on her test and that the clear blue tests are more sensitive than the one she used. I just don’t understand why I’m having 4 positives but her test is negative… Photo below is of all tests I did